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A slightly more flexible way to find the best elevation data.

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This commit is contained in:
curt 2003-03-08 03:25:05 +00:00
parent e7d08d90d1
commit 887297d8d0
1 changed files with 22 additions and 19 deletions
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41
src/Airports/GenAirports/build.cxx
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@ -177,6 +177,13 @@ static point_list calc_elevations( const string& root,
const point_list& geod_nodes,
double offset )
{
string_list elev_src;
elev_src.clear();
elev_src.push_back( "SRTM-1" );
elev_src.push_back( "SRTM-3" );
elev_src.push_back( "DEM-3" );
elev_src.push_back( "DEM-30" );
bool done = false;
point_list result = geod_nodes;
int i, j;
@ -205,25 +212,21 @@ static point_list calc_elevations( const string& root,
SGBucket b( result[i].x(), result[i].y() );
string base = b.gen_base_path();
// try 3 arcsec arrays first
string array_path = root + "/DEM-3/" + base
+ "/" + b.gen_index_str() + ".arr";
SG_LOG(SG_GENERAL, SG_DEBUG, "array_path = " << array_path);
if ( ! array.open(array_path) ) {
SG_LOG(SG_GENERAL, SG_DEBUG, "ERROR: cannot open 3 arcsec file "
<< array_path);
SG_LOG(SG_GENERAL, SG_DEBUG, "trying 30 arcsec file");
// try 30 arcsec array
array_path = root + "/DEM-30/" + base
+ "/" + b.gen_index_str() + ".arr";
SG_LOG(SG_GENERAL, SG_DEBUG, "array_path = " << array_path);
if ( ! array.open(array_path) ) {
SG_LOG(SG_GENERAL, SG_ALERT,
"ERROR: cannot open 30 arcsec file " << array_path);
}
}
// try the various elevation sources
bool found_file = false;
unsigned int j = 0;
while ( !found_file && j < elev_src.size() ) {
string array_path = root + "/" + elev_src[j] + "/" + base
+ "/" + b.gen_index_str() + ".arr";
if ( array.open(array_path) ) {
found_file = true;
SG_LOG(SG_GENERAL, SG_DEBUG, "array_path = " << array_path);
}
j++;
}
// this will fill in a zero structure if no array data
// found/opened
array.parse( b );
// update all the non-updated elevations that are inside