- fixed multithreaded construct memory leak in TGArray usage ( need to clear corner and fitted lists ).

- reworked priorities.hxx/.cxx to make valgrind happy.  It also allows us to add more features per area (like smoothing).
- remove TG_MAX_AREA_TYPES - we had a merge request for this, but this does essentially the same thing with the refactoring.
- fixed some edge matching introduced in multithreaded construct.
- tgconstruct objects now live for an entire stage.  1 for each thread - this introduced the memory leaks, and some issues.
  interesting side effect is that we do less alloc / free, since we use std::vectors which when cleared, don't actually free
  memory, so by the end, we've allocated enough entries for the largest tile.
- fixed linear feature issue in genapts850 - the refactor caused some of the old clean functions to remove too many polys!
  with cgal, we need far less cleaning - just do what construct does, and we can still parse all airports, and lines are back.

src/Airports/GenAirports850/airport.cxx

@@ -347,6 +347,8 @@ void Airport::BuildBtg(const std::string& root, const string_list& elev_src )
             features[i]->BuildBtg( line_polys, rwy_lights, lf_accum, make_shapefiles );
         }
 
+//        lf_accum.ToShapefiles( "./lf_accum", "test", false );
+
         log_time = time(0);
         GENAPT_LOG( SG_GENERAL, SG_ALERT, "Finished building Linear Features for " << icao << " at " << DebugTimeToString(log_time) );
     }
@@ -658,15 +660,18 @@ void Airport::BuildBtg(const std::string& root, const string_list& elev_src )
     {
         tgPolygon poly = line_polys[k];
 
+#if 1
         poly = tgPolygon::RemoveCycles( poly );
         poly = tgPolygon::RemoveDups( poly );
         poly = tgPolygon::RemoveBadContours( poly );
-        poly = tgPolygon::Simplify( poly );
+
-        poly = tgPolygon::RemoveTinyContours( poly );
+//        poly = tgPolygon::Simplify( poly );
-        poly = tgPolygon::RemoveSpikes( poly );
+//        poly = tgPolygon::RemoveTinyContours( poly );
-        poly = tgPolygon::RemoveDups( poly );
+//        poly = tgPolygon::RemoveSpikes( poly );
-        poly = tgPolygon::RemoveBadContours( poly );
+//        poly = tgPolygon::RemoveDups( poly );
-        poly = tgPolygon::RemoveTinyContours( poly );
+//        poly = tgPolygon::RemoveBadContours( poly );
+//        poly = tgPolygon::RemoveTinyContours( poly );
+#endif
 
         line_polys[k] = poly;
     }
@@ -1232,6 +1237,5 @@ void Airport::BuildBtg(const std::string& root, const string_list& elev_src )
 
     chopper.Add( divided_base, "Hole" );
     chopper.Add( apt_clearing, "Airport" );
-
     chopper.Save();
 }

src/Airports/GenAirports850/closedpoly.cxx

@@ -457,7 +457,7 @@ int ClosedPoly::BuildBtg( tgpolygon_list& rwy_polys, tgcontour_list& slivers, tg
     {
         if(  shapefile_name.size() ) {
             tgShapefile::FromPolygon( pre_tess, "./airport_dbg", std::string("preclip"), shapefile_name );
-            accum.ToShapefiles( "./airport_dbg", "accum" );
+            accum.ToShapefiles( "./airport_dbg", "accum", true );
         }
 
         tgPolygon clipped = accum.Diff( pre_tess );

src/Airports/GenAirports850/linearfeature.cxx

@@ -362,110 +362,6 @@ LinearFeature::~LinearFeature()
     }
 }
 
-#if 0
-SGGeod LinearFeature::OffsetPointMiddle( const SGGeod& gPrev, const SGGeod& gCur, const SGGeod& gNext, double offset_by )
-{
-    double  courseCur, courseNext, courseAvg, theta;
-    SGVec3d dirCur, dirNext, dirAvg, cp;
-    double  courseOffset, distOffset;
-    SGGeod  pt;
-
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "Find average angle for contour: prev (" << gPrev << "), "
-                                                                  "cur (" << gCur  << "), "
-                                                                 "next (" << gNext << ")" );
-
-    // first, find if the line turns left or right ar src
-    // for this, take the cross product of the vectors from prev to src, and src to next.
-    // if the cross product is negetive, we've turned to the left
-    // if the cross product is positive, we've turned to the right
-    courseCur = SGGeodesy::courseDeg( gCur, gPrev );
-    dirCur = SGVec3d( sin( courseCur*SGD_DEGREES_TO_RADIANS ), cos( courseCur*SGD_DEGREES_TO_RADIANS ), 0.0f );
-
-    courseNext = SGGeodesy::courseDeg( gCur, gNext );
-    dirNext = SGVec3d( sin( courseNext*SGD_DEGREES_TO_RADIANS ), cos( courseNext*SGD_DEGREES_TO_RADIANS ), 0.0f );
-
-    // Now find the average
-    dirAvg = normalize( dirCur + dirNext );
-    courseAvg = SGMiscd::rad2deg( atan( dirAvg.x()/dirAvg.y() ) );
-    if (courseAvg < 0) {
-        courseAvg += 180.0f;
-    }
-
-    // check the turn direction
-    cp    = cross( dirCur, dirNext );
-    theta = SGMiscd::rad2deg(CalculateTheta( dirCur, dirNext, cp ) );
-
-    if ( (abs(theta - 180.0) < 0.1) || (abs(theta) < 0.1) || (isnan(theta)) ) {
-        GENAPT_LOG(SG_GENERAL, SG_DEBUG, "\nLinearFeature: (degenerate case) " << description << ": theta is " << theta );
-
-        // straight line blows up math - offset 90 degree and dist is as given
-        courseOffset = SGMiscd::normalizePeriodic(0, 360, courseNext-90.0);
-        distOffset   = offset_by;
-    }  else  {
-        GENAPT_LOG(SG_GENERAL, SG_DEBUG, "\nLinearFeature: (normal case) " << description << ": theta is " << theta );
-
-        // calculate correct distance for the offset point
-        if (cp.z() < 0.0f) {
-            courseOffset = SGMiscd::normalizePeriodic(0, 360, courseAvg+180);
-        } else {
-            courseOffset = SGMiscd::normalizePeriodic(0, 360, courseAvg);
-        }
-        distOffset = (offset_by)/sin(SGMiscd::deg2rad(courseNext-courseOffset));
-    }
-
-    // calculate the point from cur
-    pt = SGGeodesy::direct(gCur, courseOffset, distOffset);
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "\theading is " << courseOffset << " distance is " << distOffset << " point is (" << pt.getLatitudeDeg() << "," << pt.getLongitudeDeg() << ")" );
-
-    return pt;
-}
-
-SGGeod LinearFeature::OffsetPointFirst( const SGGeod& cur, const SGGeod& next, double offset_by )
-{
-    double courseOffset;
-    SGGeod pt;
-
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "Find OffsetPoint at Start : cur (" << cur  << "), "
-                                                            "next (" << next << ")" );
-
-    // find the offset angle
-    courseOffset = SGGeodesy::courseDeg( cur, next ) - 90;
-    courseOffset = SGMiscd::normalizePeriodic(0, 360, courseOffset);
-
-    // calculate the point from cur
-    pt = SGGeodesy::direct( cur, courseOffset, offset_by );
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "\theading is " << courseOffset << " distance is " << offset_by << " point is (" << pt.getLatitudeDeg() << "," << pt.getLongitudeDeg() << ")" );
-
-    return pt;
-}
-
-SGGeod LinearFeature::OffsetPointLast( const SGGeod& prev, const SGGeod& cur, double offset_by )
-{
-    double courseOffset;
-    SGGeod pt;
-
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "Find OffsetPoint at End   : prev (" << prev  << "), "
-                                                              "cur (" << cur << ")" );
-
-    // find the offset angle
-    courseOffset = SGGeodesy::courseDeg( prev, cur ) - 90;
-    courseOffset = SGMiscd::normalizePeriodic(0, 360, courseOffset);
-
-    // calculate the point from cur
-    pt = SGGeodesy::direct( cur, courseOffset, offset_by );
-    GENAPT_LOG(SG_GENERAL, SG_DEBUG, "\theading is " << courseOffset << " distance is " << offset_by << " point is (" << pt.getLatitudeDeg() << "," << pt.getLongitudeDeg() << ")" );
-
-    return pt;
-}
-
-SGGeod midpoint( const SGGeod& p0, const SGGeod& p1 )
-{
-    return SGGeod::fromDegM( (p0.getLongitudeDeg() + p1.getLongitudeDeg()) / 2,
-                             (p0.getLatitudeDeg()  + p1.getLatitudeDeg()) / 2,
-                             (p0.getElevationM()   + p1.getElevationM()) / 2 );
-}
-#endif
-
 int LinearFeature::Finish( bool closed, unsigned int idx )
 {
     tgPolygon   poly;

src/Airports/GenAirports850/linearfeature.hxx

@@ -97,10 +97,6 @@ public:
     int BuildBtg( tgpolygon_list& line_polys, tglightcontour_list& lights, tgAccumulator& accum, bool debug );
 
 private:
-//    SGGeod OffsetPointFirst(  const SGGeod& cur,  const SGGeod& next, double offset_by );
-//    SGGeod OffsetPointMiddle( const SGGeod& prev, const SGGeod& cur,  const SGGeod& next, double offset_by );
-//    SGGeod OffsetPointLast(   const SGGeod& prev, const SGGeod& cur,  double offset_by );
-
     double          offset;
     double          width;
 
@@ -128,4 +124,3 @@ private:
 typedef std::vector <LinearFeature *> FeatureList;
 
 #endif
-

src/Airports/GenAirports850/taxiway.cxx

@@ -138,7 +138,7 @@ int Taxiway::BuildBtg( tgpolygon_list& rwy_polys, tglightcontour_list& rwy_light
         taxi_poly.AddContour( taxi_contour );
 
         tgShapefile::FromPolygon( taxi_poly, "./airport_dbg", std::string("preclip"), shapefile_name );
-        accum.ToShapefiles( "./airport_dbg", "accum" );
+        accum.ToShapefiles( "./airport_dbg", "accum", true );
     }
 
     tgPolygon clipped = accum.Diff( taxi_contour );

src/BuildTiles/Main/main.cxx

@@ -22,10 +22,13 @@
 #  include <config.h>
 #endif
 
+#include <boost/thread.hpp>
+
 #include <simgear/debug/logstream.hxx>
 #include <Include/version.h>
 
 #include "tgconstruct.hxx"
+#include "priorities.hxx"
 #include "usgs.hxx"
 
 using std::string;
@@ -47,6 +50,8 @@ static void usage( const string name ) {
     SG_LOG(SG_GENERAL, SG_ALERT, "  --priorities=<filename>");
     SG_LOG(SG_GENERAL, SG_ALERT, "  --usgs-map=<filename>");
     SG_LOG(SG_GENERAL, SG_ALERT, "  --ignore-landmass");
+    SG_LOG(SG_GENERAL, SG_ALERT, "  --threads");
+    SG_LOG(SG_GENERAL, SG_ALERT, "  --threads=<numthreads>");
     SG_LOG(SG_GENERAL, SG_ALERT, " ] <load directory...>");
     exit(-1);
 }
@@ -60,6 +65,7 @@ int main(int argc, char **argv) {
     string usgs_map_file = DEFAULT_USGS_MAPFILE;
     SGGeod min, max;
     long tile_id = -1;
+    int num_threads = 1;
 
     vector<string> load_dirs;
     bool ignoreLandmass = false;
@@ -104,6 +110,10 @@ int main(int argc, char **argv) {
             usgs_map_file = arg.substr(11);
         } else if (arg.find("--ignore-landmass") == 0) {
             ignoreLandmass = true;
+        } else if (arg.find("--threads=") == 0) {
+            num_threads = atoi( arg.substr(10).c_str() );
+        } else if (arg.find("--threads") == 0) {
+            num_threads = boost::thread::hardware_concurrency();
         } else if (arg.find("--debug-dir=") == 0) {
             debug_dir = arg.substr(12);
         } else if (arg.find("--debug-areas=") == 0) {
@@ -117,8 +127,6 @@ int main(int argc, char **argv) {
         }
     }
 
-    int num_threads = 8;
-
     if ( share_dir == "" ) {
         share_dir = work_dir + "/Shared";
     }
@@ -146,9 +154,9 @@ int main(int argc, char **argv) {
         SG_LOG(SG_GENERAL, SG_ALERT, "Load directory: " << argv[i]);
     }
 
-    if ( !load_area_types( priorities_file )
+    TGAreaDefinitions areas;
-        || (!cover.empty() && !load_usgs_map( usgs_map_file)) ) {
+    if ( areas.init( priorities_file ) ) {
-        exit(-1);
+        exit( -1 );
     }
 
     // three identical work queues
@@ -195,8 +203,8 @@ int main(int argc, char **argv) {
     std::vector<TGConstruct *> constructs;
 
     for (int i=0; i<num_threads; i++) {
-        TGConstruct* construct = new TGConstruct( 1, wq[0] );
+        TGConstruct* construct = new TGConstruct( areas, 1, wq[0] );
-        construct->set_cover( cover );
+        //construct->set_cover( cover );
         construct->set_paths( work_dir, share_dir, output_dir, load_dirs );
         construct->set_options( ignoreLandmass, nudge );
         construct->set_debug( debug_dir, debug_area_defs, debug_shape_defs );
@@ -207,10 +215,15 @@ int main(int argc, char **argv) {
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->start();
     }
+    // wait for workqueue to empty
+    while( wq[0].size() ) {
+        sleep( 5 );
+    }
     // wait for all threads to complete
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->join();
     }
+
     // delete the stage 1 construct objects
     for (unsigned int i=0; i<constructs.size(); i++) {
         delete constructs[i];
@@ -218,8 +231,8 @@ int main(int argc, char **argv) {
     constructs.clear();
 
     for (int i=0; i<num_threads; i++) {
-        TGConstruct* construct = new TGConstruct( 2, wq[1] );
+        TGConstruct* construct = new TGConstruct( areas, 2, wq[1] );
-        construct->set_cover( cover );
+        //construct->set_cover( cover );
         construct->set_paths( work_dir, share_dir, output_dir, load_dirs );
         construct->set_options( ignoreLandmass, nudge );
         construct->set_debug( debug_dir, debug_area_defs, debug_shape_defs );
@@ -230,6 +243,10 @@ int main(int argc, char **argv) {
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->start();
     }
+    // wait for workqueue to empty
+    while( wq[1].size() ) {
+        sleep( 5 );
+    }
     // wait for all threads to complete
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->join();
@@ -241,8 +258,8 @@ int main(int argc, char **argv) {
     constructs.clear();
 
     for (int i=0; i<num_threads; i++) {
-        TGConstruct* construct = new TGConstruct( 3, wq[2] );
+        TGConstruct* construct = new TGConstruct( areas, 3, wq[2] );
-        construct->set_cover( cover );
+        //construct->set_cover( cover );
         construct->set_paths( work_dir, share_dir, output_dir, load_dirs );
         construct->set_options( ignoreLandmass, nudge );
         construct->set_debug( debug_dir, debug_area_defs, debug_shape_defs );
@@ -253,6 +270,10 @@ int main(int argc, char **argv) {
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->start();
     }
+    // wait for workqueue to empty
+    while( wq[2].size() ) {
+        sleep( 5 );
+    }
     // wait for all threads to complete
     for (unsigned int i=0; i<constructs.size(); i++) {
         constructs[i]->join();

src/BuildTiles/Main/priorities.cxx

@@ -31,37 +31,10 @@
 
 #include "priorities.hxx"
 
-using std::ifstream;
+int TGAreaDefinitions::init( const std::string& filename )
-using std::string;
+{
-using std::map;
+    std::ifstream in ( filename.c_str() );
-using std::vector;
+    unsigned int cur_priority = 0;
-
-typedef enum {
-    Hole,
-    Landmass,
-    Island,
-    Ocean,
-    Lake,
-    Stream,
-    Road,
-    Other
-} AreaKind;
-
-typedef struct {
-    string name;
-    AreaKind kind;
-} area_type_descriptor;
-
-typedef vector<area_type_descriptor> area_type_list;
-typedef map<string, AreaType> area_name_map;
-
-static area_type_list area_types;
-static area_name_map area_names;
-static AreaType default_area_type;
-static AreaType sliver_target_area_type;
-
-int load_area_types( const std::string& filename ) {
-    ifstream in ( filename.c_str() );
 
     if ( ! in ) {
         SG_LOG(SG_GENERAL, SG_ALERT, "Unable to open priorities file " << filename);
@@ -70,119 +43,28 @@ int load_area_types( const std::string& filename ) {
     SG_LOG(SG_GENERAL, SG_ALERT, "Priorities file is " << filename);
 
     in >> skipcomment;
-    string sliver_area_name, default_area_name;
+    std::string sa_name, da_name;
 
-    in >> default_area_name;
+    in >> da_name;
     in >> skipcomment;
-    in >> sliver_area_name;
+    in >> sa_name;
     in >> skipcomment;
+
+    std::string name, category;
+
     while ( !in.eof() ) {
-        area_type_descriptor descriptor;
+        in >> name;
-        string type;
+        in >> category;
-        descriptor.kind = Other;
-        in >> descriptor.name;
-        in >> type;
-        if ( type=="hole" ) {
-            descriptor.kind = Hole;
-        } else if ( type=="landmass" ) {
-            descriptor.kind = Landmass;
-        } else if ( type=="island" ) {
-            descriptor.kind = Island;
-        } else if ( type=="ocean" ) {
-            descriptor.kind = Ocean;
-        } else if ( type=="lake" ) {
-            descriptor.kind = Lake;
-        } else if ( type=="stream" ) {
-            descriptor.kind = Stream;
-        } else if ( type=="road" ) {
-            descriptor.kind = Road;
-        } else if ( type=="other" ) {
-            descriptor.kind = Other;
-        }
-        AreaType index = (AreaType)area_types.size();
-        area_types.push_back(descriptor);
-        area_names[descriptor.name]=index;
-        SG_LOG(SG_GENERAL, SG_INFO, "  " << index << " " << descriptor.name << " " << descriptor.kind);
         in >> skipcomment;
+
+        if ( name == sa_name ) {
+            sliver_area_name     = sa_name;
+            sliver_area_priority = cur_priority;
         }
 
+        area_defs.push_back( TGAreaDefinition( name, category, cur_priority++ ) );
+    }
     in.close();
 
-    sliver_target_area_type = get_area_type( sliver_area_name );
+    return 0;
-    default_area_type = get_area_type( default_area_name );
-    
-    return 1;
-}
-// return area type from text name
-AreaType 
-get_area_type (const string &area) {
-    area_name_map::const_iterator it = area_names.find(area);
-    if (it != area_names.end()) {
-        return it->second;
-    } else {
-	SG_LOG(SG_GENERAL, SG_ALERT, "unknown area = '" << area << "'");
-	exit(-1);
-    }
-}
-
-
-static area_type_descriptor& get_area_descriptor( AreaType area ) {
-    if ( 0<=area || area < area_types.size() ) {
-        return area_types[area];
-    } else {
-	SG_LOG(SG_GENERAL, SG_ALERT, "unknown area code = " << (int)area);
-	exit(-1);
-    }
-}
-
-// return text from of area name
-string get_area_name( AreaType area ) {
-    return get_area_descriptor( area ).name;
-}
-
-bool is_hole_area( AreaType area ) {
-    return get_area_descriptor( area ).kind==Hole;
-}
-
-bool is_water_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Ocean || kind==Lake || kind==Stream);
-}
-
-bool is_landmass_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Landmass);
-}
-
-bool is_island_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Island);
-}
-
-bool is_lake_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Lake);
-}
-
-bool is_stream_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Stream);
-}
-
-bool is_road_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Road);
-}
-
-bool is_ocean_area( AreaType area ) {
-    const AreaKind kind = get_area_descriptor( area ).kind;
-    return (kind==Ocean);
-}
-
-AreaType get_sliver_target_area_type() {
-    return sliver_target_area_type;
-}
-
-AreaType get_default_area_type() {
-    return default_area_type;
 }

src/BuildTiles/Main/priorities.hxx

@@ -24,29 +24,151 @@
 #ifndef _PRIORITIES_HXX
 #define _PRIORITIES_HXX
 
+#include <map>
+#include <string>
 
 #include <simgear/compiler.h>
 
-#include <string>
+#include <terragear/tg_polygon.hxx>
 
-typedef unsigned int AreaType;
+class TGAreaDefinition {
-int load_area_types( const std::string& filename );
+public:
-bool is_hole_area(AreaType areaType);
+    TGAreaDefinition( const std::string& n, const std::string& c, unsigned int p ) {
-bool is_landmass_area(AreaType areaType);
+        name     = n;
-bool is_island_area(AreaType areaType);
+        category = c;
-bool is_water_area(AreaType areaType);
+        priority = p;
-bool is_lake_area(AreaType areaType);
+    };
-bool is_stream_area(AreaType areaType);
-bool is_road_area(AreaType areaType);
-bool is_ocean_area(AreaType areaType);
-AreaType get_sliver_target_area_type();
-AreaType get_default_area_type();
 
-// return area type from text name
+    std::string const& GetName() const {
-AreaType get_area_type( const std::string &area );
+        return name;
+    }
 
-// return text form of area name
+    unsigned int GetPriority() const {
-std::string get_area_name( AreaType area );
+        return priority;
+    }
+
+    std::string const& GetCategory() const {
+        return category;
+    }
+
+private:
+    std::string  name;
+    unsigned int priority;
+    std::string  category;
+
+    // future improvements
+    unsigned int smooth_method;
+    tgTexMethod  texture_method;
+    bool         layered;
+    unsigned int default_layer;
+};
+
+typedef std::vector<TGAreaDefinition> area_definition_list;
+typedef area_definition_list::const_iterator area_definition_iterator;
+
+class TGAreaDefinitions {
+public:
+    TGAreaDefinitions() {};
+    int init( const std::string& filename );
+    unsigned int size() const {
+        return area_defs.size();
+    }
+
+    bool is_hole_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "hole" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_landmass_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "landmass" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_island_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "island" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_road_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "road" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_water_area( unsigned int p ) const {
+        if ( ( area_defs[p].GetCategory() == "ocean" ) ||
+             ( area_defs[p].GetCategory() == "lake" ) ){
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_lake_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "lake" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_stream_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "stream" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    bool is_ocean_area( unsigned int p ) const {
+        if ( area_defs[p].GetCategory() == "ocean" ) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    std::string const& get_area_name( unsigned int p ) const {
+        return area_defs[p].GetName();
+    }
+
+    unsigned int get_area_priority( const std::string& name ) const {
+        for (unsigned int i=0; i < area_defs.size(); i++) {
+            if ( area_defs[i].GetName() == name ) {
+                return i;
+            }
+        }
+
+        SG_LOG(SG_GENERAL, SG_ALERT, "No area named " << name);
+        exit(0);
+        return 0;
+    }
+
+
+    std::string const& get_sliver_area_name( void ) const {
+        return sliver_area_name;
+    }
+
+    unsigned int get_sliver_area_priority( void ) const {
+        return sliver_area_priority;
+    }
+
+
+private:
+    area_definition_list area_defs;
+    std::string  sliver_area_name;
+    unsigned int sliver_area_priority;
+};
 
 #endif // _PRIORITIES_HXX
-

src/BuildTiles/Main/tgconstruct.cxx

@@ -33,7 +33,8 @@
 const double TGConstruct::gSnap = 0.00000001;      // approx 1 mm
 
 // Constructor
-TGConstruct::TGConstruct(unsigned int s, SGLockedQueue<SGBucket>& q) :
+TGConstruct::TGConstruct( const TGAreaDefinitions& areas, unsigned int s, SGLockedQueue<SGBucket>& q) :
+        area_defs(areas),
         workQueue(q),
         stage(s),
         ignoreLandmass(false),
@@ -42,13 +43,12 @@ TGConstruct::TGConstruct(unsigned int s, SGLockedQueue<SGBucket>& q) :
         isOcean(false)
 {
     total_tiles = q.size();
+    num_areas = areas.size();
 }
 
 
 // Destructor
 TGConstruct::~TGConstruct() { 
-    array.close();
-
     // land class polygons
     polys_in.clear();
     polys_clipped.clear();
@@ -82,8 +82,14 @@ void TGConstruct::run()
         // assume non ocean tile until proven otherwise
         isOcean = false;
 
-        SG_LOG(SG_GENERAL, SG_ALERT, bucket.gen_index_str() << " - Construct in " << bucket.gen_base_path() << " tile " << tiles_complete << " of " << total_tiles );
+        // Initialize the landclass lists with the number of area definitions
+        polys_in.init( num_areas );
+        polys_clipped.init( num_areas );
 
+        SG_LOG(SG_GENERAL, SG_ALERT, bucket.gen_index_str() << " - Construct in " << bucket.gen_base_path() << " tile " << tiles_complete << " of " << total_tiles << " using thread " << current() );
+
+        // Init debug shapes and area for this bucket
+        get_debug();
         if ( debug_shapes.size() || debug_all ) {
             sprintf(ds_name, "%s/constructdbg_%s", debug_path.c_str(), bucket.gen_index_str().c_str() );
         } else {
@@ -92,6 +98,7 @@ void TGConstruct::run()
 
         if ( stage > 1 ) {
             LoadFromIntermediateFiles( stage-1 );
+            LoadSharedEdgeData( stage-1 );
         }
 
         switch( stage ) {
@@ -110,12 +117,14 @@ void TGConstruct::run()
                     break;
                 }
 
+#if 0
                 // STEP 3)
                 // Load the land use polygons if the --cover option was specified
                 if ( get_cover().size() > 0 ) {
                     SG_LOG(SG_GENERAL, SG_ALERT, bucket.gen_index_str() << " - Loading landclass raster" );
                     load_landcover();
                 }
+#endif
 
                 // STEP 4)
                 // Clip the Landclass polygons
@@ -163,8 +172,8 @@ void TGConstruct::run()
                     // ONLY do this when saving edge nodes...
                     // STEP 11)
                     // Generate face-connected list - needed for saving the edge data
-                    // SG_LOG(SG_GENERAL, SG_ALERT, bucket.gen_index_str() << " - Lookup Faces Per Node");
+                    SG_LOG(SG_GENERAL, SG_ALERT, bucket.gen_index_str() << " - Lookup Faces Per Node");
-                    // LookupFacesPerNode();
+                    LookupFacesPerNode();
                 }
                 break;
 
@@ -230,10 +239,12 @@ void TGConstruct::run()
         }
 
         // Clean up for next work queue item
-        array.close();
+        array.unload();
         polys_in.clear();
         polys_clipped.clear();
         nodes.clear();
         neighbor_faces.clear();
+        debug_shapes.clear();
+        debug_areas.clear();
     }
 }

src/BuildTiles/Main/tgconstruct.hxx

@@ -33,8 +33,6 @@
 #include <simgear/threads/SGThread.hxx>
 #include <simgear/threads/SGQueue.hxx>
 
-#define TG_MAX_AREA_TYPES       128
-
 #include <Array/array.hxx>
 #include <terragear//tg_nodes.hxx>
 #include <landcover/landcover.hxx>
@@ -62,7 +60,7 @@ class TGConstruct : public SGThread
 {
 public:
     // Constructor
-    TGConstruct(unsigned int s, SGLockedQueue<SGBucket>& q);
+    TGConstruct( const TGAreaDefinitions& areas, unsigned int s, SGLockedQueue<SGBucket>& q );
 
     // Destructor
     ~TGConstruct();
@@ -71,6 +69,7 @@ public:
     void SaveToIntermediateFiles( int stage );
     void LoadFromIntermediateFiles( int stage );
 
+#if 0
     int      load_landcover ();
     double   measure_roughness( tgContour &contour );
     AreaType get_landcover_type (const LandCover &cover, double xpos, double ypos, double dx, double dy);
@@ -81,6 +80,7 @@ public:
     // land cover file
     inline std::string get_cover () const { return cover; }
     inline void set_cover (const std::string &s) { cover = s; }
+#endif
 
     // paths
     void set_paths( const std::string work, const std::string share, const std::string output, const std::vector<std::string> load_dirs );
@@ -153,10 +153,13 @@ private:
     void calc_normals( std::vector<SGGeod>& geod_nodes, std::vector<SGVec3d>& wgs84_nodes, tgPolygon& sp );
 
     // debug
+    void get_debug( void );
     bool IsDebugShape( unsigned int id );
     bool IsDebugArea( unsigned int area );
 
 private:
+    TGAreaDefinitions const& area_defs;
+    
     // construct stage to perform
     SGLockedQueue<SGBucket>& workQueue;
     unsigned int total_tiles;
@@ -185,12 +188,15 @@ private:
 
     bool debug_all;
 
-    // list of shapes to dump during debug
+    // list of debug definitions (for a whole tgconstruct run
+    std::vector<std::string> debug_area_defs;
+    std::vector<std::string> debug_shape_defs;
+
+    // list of shapes to dump during debug (for a single tile)
     std::vector<unsigned int> debug_areas;
     std::vector<unsigned int> debug_shapes;
 
-    // OGR encode variables
+    // OGR encode variables for debug:
-    // For debug:
     void*     ds_id;            // If we are going to build shapefiles
     void*     l_id;             // datasource and layer IDs
     char      ds_name[128];
@@ -213,9 +219,10 @@ private:
     // ocean tile?
     bool isOcean;
 
+    unsigned int num_areas;
+
     // Neighbor Faces
     neighbor_face_list  neighbor_faces;
 };
 
-
 #endif // _CONSTRUCT_HXX

src/BuildTiles/Main/tgconstruct_cleanup.cxx

@@ -38,7 +38,7 @@ void TGConstruct::FixTJunctions( void ) {
     tgRectangle bb;
 
     // traverse each poly, and add intermediate nodes
-    for ( unsigned int i = 0; i < TG_MAX_AREA_TYPES; ++i ) {
+    for ( unsigned int i = 0; i < area_defs.size(); ++i ) {
         for( unsigned int j = 0; j < polys_clipped.area_size(i); ++j ) {
             tgPolygon current = polys_clipped.get_poly(i, j);
             bb = current.GetBoundingBox();
@@ -49,7 +49,7 @@ void TGConstruct::FixTJunctions( void ) {
             after   = current.TotalNodes();
 
             if (before != after) {
-               SG_LOG( SG_CLIPPER, SG_DEBUG, "Fixed T-Junctions in " << get_area_name( (AreaType)i ) << ":" << j+1 << " of " << (int)polys_clipped.area_size(i) << " nodes increased from " << before << " to " << after );
+               SG_LOG( SG_CLIPPER, SG_DEBUG, "Fixed T-Junctions in " << area_defs.get_area_name(i) << ":" << j+1 << " of " << (int)polys_clipped.area_size(i) << " nodes increased from " << before << " to " << after );
             }
 
             /* Save it back */
@@ -83,7 +83,7 @@ void TGConstruct::merge_slivers( TGLandclass& clipped,  tgcontour_list& sliver_l
 
 void TGConstruct::CleanClippedPolys() {
     // Clean the polys
-    for ( unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++ ) {
+    for ( unsigned int area = 0; area < area_defs.size(); area++ ) {
         for( unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             // step 1 : snap
             tgPolygon poly = polys_clipped.get_poly(area, p);

src/BuildTiles/Main/tgconstruct_clip.cxx

@@ -38,7 +38,6 @@ bool TGConstruct::ClipLandclassPolys( void ) {
     tgPolygon remains;
     tgPolygon safety_base;
     tgcontour_list slivers;
-    int i, j;
     SGGeod p;
     SGVec2d min, max;
     bool debug_area, debug_shape;
@@ -77,17 +76,16 @@ bool TGConstruct::ClipLandclassPolys( void ) {
     tgPolygon land_mask, water_mask, island_mask;
     tgpolygon_list land_list, water_list, island_list;
 
-    for ( i = 0; i < TG_MAX_AREA_TYPES; i++ ) {
+    for ( unsigned int i = 0; i < area_defs.size(); i++ ) {
-        if ( is_landmass_area( i ) && !ignoreLandmass ) {
+        if ( area_defs.is_landmass_area(i) && !ignoreLandmass ) {
             for ( unsigned int j = 0; j < polys_in.area_size(i); ++j ) {
                 land_list.push_back( polys_in.get_poly(i, j) );
             }
-
+        } else if ( area_defs.is_water_area(i) ) {
-        } else if ( is_water_area( i ) ) {
             for (unsigned int j = 0; j < polys_in.area_size(i); j++) {
                 water_list.push_back( polys_in.get_poly(i, j) );
             }
-        } else if ( is_island_area( i ) ) {
+        } else if ( area_defs.is_island_area(i) ) {
             for (unsigned int j = 0; j < polys_in.area_size(i); j++) {
                 island_list.push_back( polys_in.get_poly(i, j) );
             }
@@ -106,23 +104,23 @@ bool TGConstruct::ClipLandclassPolys( void ) {
     }
 
     // process polygons in priority order
-    for ( i = 0; i < TG_MAX_AREA_TYPES; ++i ) {
+    for ( unsigned int i = 0; i < area_defs.size(); i++ ) {
         debug_area = IsDebugArea( i );
-        for( j = 0; j < (int)polys_in.area_size(i); ++j ) {
+        for( unsigned int j = 0; j < polys_in.area_size(i); ++j ) {
             tgPolygon& current = polys_in.get_poly(i, j);
             debug_shape = IsDebugShape( polys_in.get_poly( i, j ).GetId() );
 
-            SG_LOG( SG_CLIPPER, SG_DEBUG, "Clipping " << get_area_name( (AreaType)i ) << "(" << i << "):" << j+1 << " of " << polys_in.area_size(i) << " id " << polys_in.get_poly( i, j ).GetId() );
+            SG_LOG( SG_CLIPPER, SG_DEBUG, "Clipping " << area_defs.get_area_name( i ) << "(" << i << "):" << j+1 << " of " << polys_in.area_size(i) << " id " << polys_in.get_poly( i, j ).GetId() );
 
             tmp = current;
 
             // if not a hole, clip the area to the land_mask
-            if ( !ignoreLandmass && !is_hole_area( i ) ) {
+            if ( !ignoreLandmass && !area_defs.is_hole_area(i) ) {
                 tmp = tgPolygon::Intersect( tmp, land_mask );
             }
 
             // if a water area, cut out potential islands
-            if ( is_water_area( i ) ) {
+            if ( area_defs.is_water_area(i) ) {
                 // clip against island mask
                 tmp = tgPolygon::Diff( tmp, island_mask );
             }
@@ -136,7 +134,7 @@ bool TGConstruct::ClipLandclassPolys( void ) {
                 tgShapefile::FromPolygon( tmp, ds_name, layer, name );
 
                 sprintf(layer, "pre_clip_accum_%d_%d", accum_idx, polys_in.get_poly( i, j ).GetId() );
-                accum.ToShapefiles( ds_name, layer );
+                accum.ToShapefiles( ds_name, layer, true );
             }
 
             clipped = accum.Diff( tmp );
@@ -180,7 +178,7 @@ bool TGConstruct::ClipLandclassPolys( void ) {
                 char layer[32];
                 sprintf(layer, "post_clip_accum_%d_%d", accum_idx, polys_in.get_poly( i, j ).GetId() );
 
-                accum.ToShapefiles( ds_name, layer );
+                accum.ToShapefiles( ds_name, layer, true );
             }
 
             accum_idx++;
@@ -231,18 +229,18 @@ bool TGConstruct::ClipLandclassPolys( void ) {
 #endif
 
         if ( remains.Contours() > 0 ) {
-            remains.SetMaterial( get_area_name(get_sliver_target_area_type()) );
+            remains.SetMaterial( area_defs.get_sliver_area_name() );
             remains.SetTexMethod( TG_TEX_BY_GEODE, bucket.get_center_lat() );
-            polys_clipped.add_poly( (int)get_sliver_target_area_type(), remains );
+            polys_clipped.add_poly( area_defs.get_sliver_area_priority(), remains );
         }
     }
 
     // Now make sure any newly added intersection nodes are added to the tgnodes
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
         for (unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon& poly = polys_clipped.get_poly( area, p );
 
-            SG_LOG( SG_CLIPPER, SG_DEBUG, "Collecting nodes for " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
+            SG_LOG( SG_CLIPPER, SG_DEBUG, "Collecting nodes for " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
 
             for (unsigned int con=0; con < poly.Contours(); con++) {
                 for (unsigned int n = 0; n < poly.ContourSize( con ); n++) {

src/BuildTiles/Main/tgconstruct_debug.cxx

@@ -32,13 +32,23 @@
 
 using std::string;
 
-void TGConstruct::set_debug( std::string path, std::vector<string> area_defs, std::vector<string> shape_defs )
+void TGConstruct::set_debug( std::string path, std::vector<string> a_defs, std::vector<string> s_defs )
 {
     debug_path = path;
 
+    debug_area_defs = a_defs;
+    debug_shape_defs = s_defs;
+}
+
+void TGConstruct::get_debug( void )
+{
+    // clear out any previous entries
+    debug_areas.clear();
+    debug_shapes.clear();
+
     /* Find any ids for our tile */
-    for (unsigned int i=0; i< area_defs.size(); i++) {
+    for (unsigned int i=0; i< debug_area_defs.size(); i++) {
-        string dsd     = area_defs[i];
+        string dsd     = debug_area_defs[i];
         size_t d_pos   = dsd.find(":");
         string tile    = dsd.substr(0, d_pos);
 
@@ -64,8 +74,8 @@ void TGConstruct::set_debug( std::string path, std::vector<string> area_defs, st
         }
     }
 
-    for (unsigned int i=0; i< shape_defs.size(); i++) {
+    for (unsigned int i=0; i< debug_shape_defs.size(); i++) {
-        string dsd     = shape_defs[i];
+        string dsd     = debug_shape_defs[i];
         size_t d_pos   = dsd.find(":");
         string tile    = dsd.substr(0, d_pos);
 

src/BuildTiles/Main/tgconstruct_elevation.cxx

@@ -48,7 +48,6 @@ void TGConstruct::LoadElevationArray( bool add_nodes ) {
 
     array.parse( bucket );
     array.remove_voids( );
-
     if ( add_nodes ) {
         std::vector<SGGeod> const& corner_list = array.get_corner_list();
         for (unsigned int i=0; i<corner_list.size(); i++) {
@@ -84,10 +83,10 @@ void TGConstruct::CalcElevations( void )
     nodes.get_geod_nodes(raw_nodes);
 
     // now flatten some stuff
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
-        if ( is_lake_area( (AreaType)area ) ) {
+        if ( area_defs.is_lake_area(area) ) {
             for (int p = 0; p < (int)polys_clipped.area_size(area); ++p ) {
-                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << (int)polys_clipped.area_size(area) );
+                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
                 tgPolygon poly = polys_clipped.get_poly( area, p );
 
                 for (unsigned int tri=0; tri < poly.Triangles(); tri++) {
@@ -109,9 +108,9 @@ void TGConstruct::CalcElevations( void )
             }
         }
 
-        if ( is_stream_area( (AreaType)area ) ) {
+        if ( area_defs.is_stream_area(area) ) {
-            for (int p = 0; p < (int)polys_clipped.area_size(area); ++p ) {
+            for (unsigned int p = 0; p < polys_clipped.area_size(area); ++p ) {
-                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << (int)polys_clipped.area_size(area) );
+                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
                 tgPolygon poly = polys_clipped.get_poly( area, p );
 
                 for (unsigned int tri=0; tri < poly.Triangles(); tri++) {
@@ -156,9 +155,9 @@ void TGConstruct::CalcElevations( void )
             }
         }
 
-        if ( is_road_area( (AreaType)area ) ) {
+        if ( area_defs.is_road_area(area) ) {
             for (int p = 0; p < (int)polys_clipped.area_size(area); ++p ) {
-                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << (int)polys_clipped.area_size(area) );
+                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
                 tgPolygon poly = polys_clipped.get_poly( area, p );
 
                 for (unsigned int tri=0; tri < poly.Triangles(); tri++) {
@@ -203,9 +202,9 @@ void TGConstruct::CalcElevations( void )
             }
         }
 
-        if ( is_ocean_area( (AreaType)area ) ) {
+        if ( area_defs.is_ocean_area(area) ) {
             for (int p = 0; p < (int)polys_clipped.area_size(area); ++p ) {
-                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << (int)polys_clipped.area_size(area) );
+                SG_LOG( SG_CLIPPER, SG_DEBUG, "Flattening " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
                 tgPolygon poly = polys_clipped.get_poly( area, p );
 
                 for (unsigned int tri=0; tri < poly.Triangles(); tri++) {

src/BuildTiles/Main/tgconstruct_landclass.cxx

@@ -7,7 +7,7 @@
 //
 // This program is free software; you can redistribute it and/or
 // modify it under the terms of the GNU General Public License as
-// published by the Free Software Foundation; either version 2 of the
+// // published by the Free Software Foundation; either version 2 of the
 // License, or (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful, but
@@ -21,6 +21,8 @@
 //
 // $Id: construct.cxx,v 1.4 2004-11-19 22:25:49 curt Exp $
 
+#if 0
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
@@ -279,3 +281,5 @@ int TGConstruct::load_landcover()
     // Return the number of polygons actually read.
     return count;
 }
+
+#endif

src/BuildTiles/Main/tgconstruct_lookup.cxx

@@ -35,7 +35,7 @@
 void TGConstruct::LookupNodesPerVertex( void )
 {
     // for each node, traverse all the triangles - and create face lists
-    for ( unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++ ) {
+    for ( unsigned int area = 0; area < area_defs.size(); area++ ) {
         for( unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon& poly = polys_clipped.get_poly( area, p );
 
@@ -57,7 +57,7 @@ void TGConstruct::LookupNodesPerVertex( void )
 void TGConstruct::LookupFacesPerNode( void )
 {
     // Add each face that includes a node to the node's face list
-    for ( unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++ ) {
+    for ( unsigned int area = 0; area < area_defs.size(); area++ ) {
         for( unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon const& poly = polys_clipped.get_poly(area, p );
 

src/BuildTiles/Main/tgconstruct_math.cxx

@@ -97,9 +97,9 @@ void TGConstruct::CalcFaceNormals( void )
     std::vector<SGGeod>  geod_nodes;
     nodes.get_geod_nodes( geod_nodes );
 
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
         for (unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
-            SG_LOG( SG_CLIPPER, SG_DEBUG, "Calculating face normals for " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << polys_in.area_size(area) );
+            SG_LOG( SG_CLIPPER, SG_DEBUG, "Calculating face normals for " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_in.area_size(area) );
             calc_normals( geod_nodes, wgs84_nodes, polys_clipped.get_poly( area, p ) );
         }
     }

src/BuildTiles/Main/tgconstruct_output.cxx

@@ -135,11 +135,11 @@ void TGConstruct::WriteBtgFile( void )
     int_list pt_n, tri_n, strip_n;
     int_list tri_tc, strip_tc;
 
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
         // only tesselate non holes
-        if ( !is_hole_area( area ) ) {
+        if ( !area_defs.is_hole_area(area) ) {
             for (unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
-                SG_LOG( SG_CLIPPER, SG_DEBUG, "Ouput nodes for " << get_area_name( (AreaType)area ) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
+                SG_LOG( SG_CLIPPER, SG_DEBUG, "Ouput nodes for " << area_defs.get_area_name(area) << ":" << p+1 << " of " << polys_clipped.area_size(area) );
 
                 tgPolygon   poly      = polys_clipped.get_poly(area, p);
                 string      material  = poly.GetMaterial();

src/BuildTiles/Main/tgconstruct_poly.cxx

@@ -82,8 +82,9 @@ int TGConstruct::LoadLandclassPolys( void ) {
                 for ( unsigned int i=0; i<count; i++ ) {
                     tgPolygon poly;
                     poly.LoadFromGzFile( fp );
-                    area = get_area_type( poly.GetFlag() );
+                    area     = area_defs.get_area_priority( poly.GetFlag() );
-                    material = get_area_name( area );
+                    material = area_defs.get_area_name( area );
+
                     poly.SetMaterial( material );
                     poly.SetId( cur_poly_id++ );
 
@@ -96,10 +97,6 @@ int TGConstruct::LoadLandclassPolys( void ) {
                             SGGeod const& node  = poly.GetNode( j, k );
 
                             if ( poly.GetPreserve3D() ) {
-                                if ( node.getElevationM() < 2.0 ) {
-                                    SG_LOG(SG_GENERAL, SG_ALERT, "FIXED ELEVATION NODE in POLY " << poly.GetFlag() << " has elevation " << node.getElevationM() );
-                                }
-                                
                                 nodes.unique_add_fixed_elevation( node );
                             } else {
                                 nodes.unique_add( node );
@@ -107,7 +104,6 @@ int TGConstruct::LoadLandclassPolys( void ) {
                         }
                     }
                 }
-                gzclose( fp ); 
 
                 gzclose( fp );
                 SG_LOG(SG_GENERAL, SG_DEBUG, " Loaded " << p.file());

src/BuildTiles/Main/tgconstruct_tesselate.cxx

@@ -37,7 +37,7 @@ void TGConstruct::TesselatePolys( void )
     std::vector<SGGeod> poly_extra;
     SGGeod min, max;
 
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
         for (unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon poly = polys_clipped.get_poly(area, p );
 
@@ -48,8 +48,8 @@ void TGConstruct::TesselatePolys( void )
             tgRectangle rect = poly.GetBoundingBox();
             nodes.get_geod_inside( rect.getMin(), rect.getMax(), poly_extra );
 
-            SG_LOG( SG_CLIPPER, SG_DEBUG, "Tesselating " << get_area_name( (AreaType)area ) << "(" << area << "): " <<
+            SG_LOG( SG_CLIPPER, SG_DEBUG, "Tesselating " << area_defs.get_area_name(area) << "(" << area << "): " <<
-                    p+1 << " of " << (int)polys_clipped.area_size(area) << ": id = " << poly.GetId() );
+                    p+1 << " of " << polys_clipped.area_size(area) << ": id = " << poly.GetId() );
 
             if ( IsDebugShape( poly.GetId() ) ) {
                 SG_LOG( SG_CLIPPER, SG_INFO, poly );
@@ -61,7 +61,7 @@ void TGConstruct::TesselatePolys( void )
         }
     }
 
-    for (unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++) {
+    for (unsigned int area = 0; area < area_defs.size(); area++) {
         for (unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon& poly = polys_clipped.get_poly(area, p );
 

src/BuildTiles/Main/tgconstruct_texture.cxx

@@ -30,10 +30,10 @@
 
 void TGConstruct::CalcTextureCoordinates( void )
 {
-    for ( unsigned int area = 0; area < TG_MAX_AREA_TYPES; area++ ) {
+    for ( unsigned int area = 0; area < area_defs.size(); area++ ) {
         for( unsigned int p = 0; p < polys_clipped.area_size(area); p++ ) {
             tgPolygon poly = polys_clipped.get_poly(area, p);
-            SG_LOG( SG_CLIPPER, SG_DEBUG, "Texturing " << get_area_name( (AreaType)area ) << "(" << area << "): " <<
+            SG_LOG( SG_CLIPPER, SG_DEBUG, "Texturing " << area_defs.get_area_name(area) << "(" << area << "): " <<
                     p+1 << " of " << polys_clipped.area_size(area) << " with " << poly.GetMaterial() );
 
             poly.Texture( );

src/BuildTiles/Main/tglandclass.cxx

@@ -35,39 +35,45 @@
 
 void TGLandclass::clear(void)
 {
-    int i;
+    for (unsigned int i=0; i<polys.size(); i++) {
-
-    for (i=0; i<TG_MAX_AREA_TYPES; i++) {
         polys[i].clear();
     }
+    // keep the number of arrays intact - it's constant throughout construct
+    polys.clear();
 }
 
 void TGLandclass::LoadFromGzFile(gzFile& fp)
 {
-    int i, j, count;
+    int i, j, num_layers, num_polys;
 
     // Load all landclass shapes
-    for (i=0; i<TG_MAX_AREA_TYPES; i++) {
+    sgReadInt( fp, &num_layers );
-        sgReadInt( fp, &count );
 
-        for (j=0; j<count; j++) {
+    polys.clear();
+    for (i=0; i<num_layers; i++) {
+        tgpolygon_list lc;
+        sgReadInt( fp, &num_polys );
+
+        lc.clear();
+        for (j=0; j<num_polys; j++) {
             tgPolygon poly;
-
             poly.LoadFromGzFile( fp );
-            polys[i].push_back( poly );
+            lc.push_back( poly );
         }
+        polys.push_back(lc);
     }
 }
+
 std::ostream& operator<< ( std::ostream& out, const TGLandclass& lc )
 {
-    int i, j, count;
+    unsigned int count;
     tgPolygon poly;
 
     // Save all landclass shapes
-    for (i=0; i<TG_MAX_AREA_TYPES; i++) {
+    for (unsigned int i=0; i<lc.polys.size(); i++) {
         count = lc.polys[i].size();
         out << count << "\n";
-        for (j=0; j<count; j++) {
+        for (unsigned int j=0; j<count; j++) {
             out << lc.polys[i][j] << " ";
         }
         out << "\n";
@@ -75,17 +81,20 @@ std::ostream& operator<< ( std::ostream& out, const TGLandclass& lc )
 
     return out;
 }
+
 void TGLandclass::SaveToGzFile(gzFile& fp)
 {
-    int i, j, count;
+    int i, j, num_layers, num_polys;
     tgPolygon shape;
 
     // Save all landclass shapes
-    for (i=0; i<TG_MAX_AREA_TYPES; i++) {
+    num_layers = polys.size();
-        count = polys[i].size();
+    sgWriteInt( fp, num_layers );
-        sgWriteInt( fp, count );
+    for (i=0; i<num_layers; i++) {
+        num_polys = polys[i].size();
+        sgWriteInt( fp, num_polys );
 
-        for (j=0; j<count; j++) {
+        for (j=0; j<num_polys; j++) {
             polys[i][j].SaveToGzFile( fp );
         }
     }

src/BuildTiles/Main/tglandclass.hxx

@@ -35,14 +35,25 @@
 
 #include <simgear/math/sg_types.hxx>
 #include <simgear/io/lowlevel.hxx>
+#include <simgear/debug/logstream.hxx>
 
 #include <terragear/tg_polygon.hxx>
 
-#define TG_MAX_AREA_TYPES       128
+typedef std::vector<tgpolygon_list> tglandclass_list;
 
 class TGLandclass
 {
 public:
+    TGLandclass() {};
+
+    void init( unsigned int num_areas) {
+        for (unsigned int i=0; i<num_areas; i++) {
+            tgpolygon_list lc;
+            lc.clear();
+            polys.push_back(lc);
+        }
+    }
+
     void clear(void);
 
     inline unsigned int area_size( unsigned int area ) const
@@ -60,6 +71,10 @@ public:
     }
     inline void add_poly( unsigned int area, const tgPolygon& p )
     {
+        if ( area > polys.capacity() ) {
+            SG_LOG( SG_CLIPPER, SG_ALERT, " area out of bounds " << area << " of " << polys.capacity() );
+            exit(0);
+        }
         polys[area].push_back( p );
     }
     inline void set_poly( unsigned int area, unsigned int poly, const tgPolygon& p )
@@ -98,7 +113,7 @@ public:
     friend std::ostream& operator<< ( std::ostream&, const TGLandclass& );
 
 private:
-    tgpolygon_list polys[TG_MAX_AREA_TYPES];
+    tglandclass_list polys;
 };
 
 #endif // _TGLANDCLASS_HXX

src/BuildTiles/Main/usgs.cxx

@@ -32,8 +32,9 @@ using std::ifstream;
 using std::string;
 using std::vector;
 
-static vector<AreaType> usgs_map;
+static vector<unsigned int> usgs_map;
 
+#if 0 // need area_defs
 int load_usgs_map( const std::string& filename ) {
     ifstream in ( filename.c_str() );
 
@@ -57,7 +58,7 @@ int load_usgs_map( const std::string& filename ) {
 }
 
 // Translate USGS land cover values into TerraGear area types.
-AreaType translateUSGSCover (unsigned int usgs_value)
+unsigned int translateUSGSCover (unsigned int usgs_value)
 {
     if ( 0<usgs_value && usgs_value<usgs_map.size() ) {
         return usgs_map[usgs_value-1];
@@ -65,4 +66,4 @@ AreaType translateUSGSCover (unsigned int usgs_value)
         return get_default_area_type();
     }
 }
-
+#endif

src/BuildTiles/Main/usgs.hxx

@@ -29,6 +29,6 @@
 #include "priorities.hxx"
 
 int load_usgs_map( const std::string& filename );
-AreaType translateUSGSCover( unsigned int usgs_value );
+unsigned int translateUSGSCover( unsigned int usgs_value );
 
 #endif // _USGS_HXX

src/Lib/Array/array.cxx

@@ -68,7 +68,7 @@ bool TGArray::open( const string& file_base ) {
     // open fitted data file
     string fitted_name = file_base + ".fit.gz";
     fitted_in = new sg_gzifstream( fitted_name );
-    if ( ! fitted_in->is_open() ) {
+    if ( !fitted_in->is_open() ) {
         // not having a .fit file is unfortunate, but not fatal.  We
         // can do a really stupid/crude fit on the fly, but it will
         // not be nearly as nice as what the offline terrafit utility
@@ -101,6 +101,27 @@ TGArray::close() {
     return true;
 }
 
+void
+TGArray::unload( void ) {
+    if (array_in) {
+        gzclose(array_in);
+        array_in = NULL;
+    }
+
+    if (fitted_in ) {
+        fitted_in->close();
+        delete fitted_in;
+        fitted_in = NULL;
+    }
+
+    if (in_data) {
+        delete[] in_data;
+        in_data = NULL;
+    }
+
+    corner_list.clear();
+    fitted_list.clear();
+}
 
 // parse Array file, pass in the bucket so we can make up values when
 // the file wasn't found.
@@ -430,7 +451,21 @@ double TGArray::altitude_from_grid( double lon, double lat ) const {
 
 TGArray::~TGArray( void )
 {
+    if (in_data) {
         delete[] in_data;
+        in_data = NULL;
+    }
+
+    if (array_in) {
+        gzclose(array_in);
+        array_in = NULL;
+    }
+
+    if (fitted_in ) {
+        fitted_in->close();
+        delete fitted_in;
+        fitted_in = NULL;
+    }
 }
 
 int TGArray::get_array_elev( int col, int row ) const

src/Lib/Array/array.hxx

@@ -102,6 +102,9 @@ public:
 
     int get_array_elev( int col, int row ) const;
     void set_array_elev( int col, int row, int val );
+
+    // reset Array to initial state - ready to load another elevation file
+    void unload( void );
 };
 
 #endif // _ARRAY_HXX

src/Lib/terragear/tg_accumulator.cxx

@@ -59,16 +59,29 @@ void tgAccumulator::Add( const tgContour& subject )
     accum.push_back( clipper_subject );
 }
 
-void tgAccumulator::ToShapefiles( const std::string& path, const std::string& layer_prefix )
+void tgAccumulator::ToShapefiles( const std::string& path, const std::string& layer_prefix, bool individual )
 {
     char shapefile[16];
     char layer[16];
 
+    if ( individual ) {
         for (unsigned int i=0; i < accum.size(); i++) {
             sprintf( layer, "%s_%d", layer_prefix.c_str(), i );
             sprintf( shapefile, "accum_%d", i );
             tgShapefile::FromClipper( accum[i], path, layer, std::string(shapefile) );
         }
+    } else {
+        ClipperLib::Polygons clipper_result;
+        ClipperLib::Clipper  c;
+        c.Clear();
+
+        for ( unsigned int i=0; i<accum.size(); i++ ) {
+            c.AddPolygons(accum[i], ClipperLib::ptSubject);
+        }
+        c.Execute( ClipperLib::ctUnion, clipper_result, ClipperLib::pftNonZero, ClipperLib::pftNonZero);
+
+        tgShapefile::FromClipper( clipper_result, path, layer_prefix, "accum" );
+    }
 }
 
 tgPolygon tgAccumulator::Diff( const tgPolygon& subject )

src/Lib/terragear/tg_accumulator.hxx

@@ -14,7 +14,7 @@ public:
     void      Add( const tgContour& subject );
     void      Add( const tgPolygon& subject );
 
-    void      ToShapefiles( const std::string& path, const std::string& layer );
+    void      ToShapefiles( const std::string& path, const std::string& layer, bool individual );
 
 private:
     typedef std::vector < ClipperLib::Polygons > clipper_polygons_list;

src/Lib/terragear/tg_chopper.cxx

@@ -200,11 +200,9 @@ long int tgChopper::GenerateIndex( std::string path )
     long int index = 0;
 
     //Open or create the named mutex
-    boost::interprocess::named_mutex mutex(boost::interprocess::open_or_create, "tgChopper_index2");
+    boost::interprocess::named_mutex mutex(boost::interprocess::open_or_create, "tgChopper_index3");
     {
-//        SG_LOG(SG_GENERAL, SG_ALERT, "getting lock");
         boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(mutex);
-//        SG_LOG(SG_GENERAL, SG_ALERT, " - got it");
 
         /* first try to read the file */
         FILE *fp = fopen( index_file.c_str(), "r+" );
@@ -218,7 +216,6 @@ long int tgChopper::GenerateIndex( std::string path )
             }
         } else {
             fread( (void*)&index, sizeof(long int), 1, fp );
-//            SG_LOG(SG_GENERAL, SG_ALERT, " SUCCESS READING INDEX FILE - READ INDEX " << index );
         }
 
         index++;

src/Lib/terragear/tg_nodes.hxx

@@ -54,11 +54,15 @@ public:
         kd_tree_valid = false;
     }
 
-    ~TGNodes( void )    {}
+    ~TGNodes( void )    {
+        tg_node_list.clear();
+        tg_kd_tree.clear();
+    }
 
     // delete all the data out of node_list
     inline void clear() {
         tg_node_list.clear();
+        tg_kd_tree.clear();
         kd_tree_valid = false;
     }
 

src/Lib/terragear/tg_polygon.cxx

@@ -346,13 +346,13 @@ void tgPolygon::LoadFromGzFile( gzFile& fp )
     sgReadString( fp, &strbuff );
     if ( strbuff ) {
         material = strbuff;
-        delete strbuff;
+        delete[] strbuff;
     }
 
     sgReadString( fp, &strbuff );
     if ( strbuff ) {
         flag = strbuff;
-        delete strbuff;
+        delete[] strbuff;
     }
 
     sgReadInt( fp, (int *)&preserve3d );

src/Lib/terragear/tg_polygon.hxx

@@ -212,6 +212,10 @@ public:
     tgPolygon() {
         preserve3d = false;
     }
+    ~tgPolygon() {
+        contours.clear();
+        triangles.clear();
+    }
 
     void Erase( void ) {
         contours.clear();

src/Lib/terragear/tg_shapefile.cxx

@@ -121,6 +121,11 @@ void tgShapefile::FromClipper( const ClipperLib::Polygons& subject, const std::s
 
         OGRFeature::DestroyFeature(feature);
     }
+
+    // close after each write
+    if ( ds_id >= 0 ) {
+        ds_id = tgShapefile::CloseDatasource( ds_id );
+    }
 }
 
 void tgShapefile::FromPolygon( const tgPolygon& subject, const std::string& datasource, const std::string& layer, const std::string& description )

src/Lib/terragear/tg_unique_tgnode.hxx

@@ -192,6 +192,11 @@ class UniqueTGNodeSet {
 public:
     UniqueTGNodeSet() {}
 
+    ~UniqueTGNodeSet() {
+        index_list.clear();
+        node_list.clear();
+    }
+
     unsigned int add( const TGNode& n ) {
         unique_tgnode_set_iterator it;
         TGNodeIndex lookup( n.GetPosition() );