Changes to process 30 arcsec binary DEM files.
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curt
parent
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commit
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3 changed files with 84 additions and 18 deletions
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@ -32,7 +32,7 @@
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int main(int argc, char **argv) {
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fgRAWDEM raw;
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char basename[256], output_dir[256], hdr_file[256], dem_file[256];
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int i;
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int i, start_lat, end_lat;
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if ( argc != 3 ) {
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printf("Usage: %s <input_file_basename> <output_dir>\n", argv[0]);
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@ -62,7 +62,11 @@ int main(int argc, char **argv) {
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/* open up the raw data file */
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rawOpenDemFile(&raw, dem_file);
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for ( i = 41; i <= 90; i++ ) {
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end_lat = raw.rooty / 3600;
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start_lat = end_lat - ((raw.nrows * raw.ydim) / 3600);
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printf("Latitude ranges from %d to %d\n", start_lat, end_lat);
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for ( i = start_lat + 1; i <= end_lat; i++ ) {
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rawProcessStrip(&raw, i, output_dir);
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}
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@ -74,9 +78,12 @@ int main(int argc, char **argv) {
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/* $Log$
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/* Revision 1.2 1998/03/03 13:10:28 curt
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/* Close to a working version.
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/* Revision 1.3 1998/03/03 21:54:50 curt
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/* Changes to process 30 arcsec binary DEM files.
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/*
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* Revision 1.2 1998/03/03 13:10:28 curt
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* Close to a working version.
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*
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* Revision 1.1 1998/03/02 23:31:01 curt
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* Initial revision.
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*
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@ -62,15 +62,15 @@ source-tar: clean
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(cd ..; \
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tar cvzf demtools-$(FG_VERSION).tar.gz Tools/Makefile Tools/README \
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Tools/Todo Tools/make.inc Tools/process-dem.pl Tools/AssemTris \
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Tools/Dem2node Tools/FixNode Tools/FixObj Tools/SplitTris \
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Tools/Stripe_u Tools/Tri2obj Tools/Triangle)
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Tools/Dem2node Tools/DemRaw2Ascii Tools/FixNode Tools/FixObj \
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Tools/SplitTris Tools/Stripe_u Tools/Tri2obj Tools/Triangle)
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source-zip: clean
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(cd ..; \
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zip -r demtools-$(FG_VERSION).zip Tools/Makefile Tools/README \
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Tools/Todo Tools/make.inc Tools/process-dem.pl Tools/AssemTris \
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Tools/Dem2node Tools/FixNode Tools/FixObj Tools/SplitTris \
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Tools/Stripe_u Tools/Tri2obj Tools/Triangle)
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Tools/Dem2node Tools/DemRaw2Ascii Tools/FixNode Tools/FixObj \
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Tools/SplitTris Tools/Stripe_u Tools/Tri2obj Tools/Triangle)
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bin-tar: all
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echo "need to fix this"
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@ -90,6 +90,9 @@ bin-zip:
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#---------------------------------------------------------------------------
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# $Log$
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# Revision 1.11 1998/03/03 21:54:43 curt
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# Changes to process 30 arcsec binary DEM files.
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#
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# Revision 1.10 1998/03/03 15:36:11 curt
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# Tweaks for compiling with g++
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#
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76
Tools/README
76
Tools/README
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@ -1,19 +1,75 @@
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1. Start with file.dem
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FG Scenery Tools README
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=======================
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2. dem2node file.dem tolerance^2 (meters)
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Contained here-in are the FG scenery creation tools. These can be
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used to convert 3 arcsec ASCII format DEM files and 30 arcsec binary
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format DEM files into Flight Gear scenery.
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- dem2node file.dem 160000
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Eventually these tools will expand to support insertion of airports,
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roads, rivers, lakes, etc.
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3. triangle -q file
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4. fixnode file
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Building the Tools
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==================
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5. tri2obj file.1
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These tools are compiled and tested under Linux. I'm all for
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portability, but I just haven't been as motivated to port these tools,
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since scenery creation is less of a general need ... especially at
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this stage. However, if anyone wants to work on porting to other
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platforms, I will be happy to incorporate patches.
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6. strip file.1.obj
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The process for building these tools is very similar to building the
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main FG source code.
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7. cp bands.d file-new.obj
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1. Set the FG_ROOT, FG_ROOT_SRC, and FG_ROOT_LIB environment
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variables.
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8. fixobj file-new
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2. Run ``make depend''
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9. cp file-new.1.obj .../Scenery/...
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3. Run ``make clean''
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4. Run ``make''
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3 Arcsec ASCII DEM files
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========================
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Data files for the USA are available in this format from:
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http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html
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To generate FG scenery from one of these dem files, run:
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./process-dem.pl <error-tolerance-squared> dem-file-1 [ dem-file-2 ...]
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You can vary the error tolerance to control the level of detail (and
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size) of the resulting scenery. Note, you must specify the error
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tolerance squared. So, if you wish to allow up to a 10 meter error
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margin (very high level of detail) you would specify a value of 100.
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If you desire an error tolerance of 200 meters (medium detail level)
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you would specify a value of 40000.
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The process-dem.pl script will automatically dump the resulting .obj
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files in the proper directory tree.
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30 Arcsec Binary DEM files
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==========================
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These data files have world wide coverage and are available from:
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http://edcwww.cr.usgs.gov/landdaac/gtopo30/gtopo30.html
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To process these data files, you must first run:
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DemRaw2Ascii/raw2ascii <input_file_basename> <output_dir>
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For example:
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DemRaw2Ascii/raw2ascii /tmp/W020N90 asciidems/
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This will create ASCII DEM files for each 1 degree x 1 degree area in
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the specified output dir.
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Then, you can take these ascii dem files and feed them through the
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same procedure you use with the 3 arcsec dem files.
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