On Tue, Aug 4, 2009 at 8:11 AM, Maxime Guillaud <m...@mguillaud.net> wrote:
> Hi all,
>
> shape-decode has been crashing on me for a certain shapefile and I can
> not figure out why. I am using terragear-cs downloaded today from the
> GIT repository. The rest of the toolchain runs fine.
>
> shape-decode runs for a while and stops with the following error:
>
> [...]
> distance = 239.828
> 0.623843, 46.9914, 0
> distance = 7.99999
> 0.626076, 46.9898, 0
> min = -2930.42, -592.671, 200 max = 0.62615, 46.997, -200
> Bucket min = -180:0, -593:2
A bucket coordinate of -593:2 suggests that this shapefile may contain some
bogus data. (or there could be a bug leading up to this) but I believe the
portion prior to the ":" represents a whole degree coordinate of the bucket,
so this should range from -180 to +179 for latitude and -90 to +89 for
longitude. -593 is completely outside of possible reality. So the question
is, is this a problem with the shapefile data, or some problem processing
the data in the shape-decode code.
Regards,
Curt.
> Bucket max = 0:2, 46:7
> polygon spans tile boundaries
> dx = 722 dy = 5117
> terminate called after throwing an instance of 'sg_exception'
> Aborted
>
>
> A run under gdb yielded the following:
>
> (gdb) run --max-segment 500 --line-width 6
>
> /storage1/flightgear/scenery-dev/terrain/custom_road_rail_from_OSM/france/fg_railways
>
> Railroad Railroad > log 2> log2
> Starting program:
>
> /storage1/flightgear/scenery-dev/terragear/install/terragear-cs/bin/shape-decode
>
> --max-segment 500 --line-width 6
>
> /storage1/flightgear/scenery-dev/terrain/custom_road_rail_from_OSM/france/fg_railways
>
> Railroad Railroad > log 2> log2
> [Thread debugging using libthread_db enabled]
> [New Thread 0x7f866f54b6f0 (LWP 10926)]
>
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0x7f866f54b6f0 (LWP 10926)]
> 0x00007f866e447015 in raise () from /lib/libc.so.6
>
> (gdb) bt
> #0 0x00007f866e447015 in raise () from /lib/libc.so.6
> #1 0x00007f866e448b83 in abort () from /lib/libc.so.6
> #2 0x00007f866ecebf94 in __gnu_cxx::__verbose_terminate_handler () from
> /usr/lib/libstdc++.so.6
> #3 0x00007f866ecea396 in ?? () from /usr/lib/libstdc++.so.6
> #4 0x00007f866ecea3c3 in std::terminate () from /usr/lib/libstdc++.so.6
> #5 0x00007f866ecea4aa in __cxa_throw () from /usr/lib/libstdc++.so.6
> #6 0x000000000041175a in tgChopNormalPolygon (pa...@0x7fff7756f220,
> poly_ty...@0x7fff7756f130, sha...@0x7fff7756eda0, preserve3d=false) at
> chop-bin.cxx:222
> #7 0x0000000000405b50 in processLine (psShape=0x202d870,
> work_d...@0x7fff7756f220, poly_ty...@0x7fff7756f130, linewidth=6) at
> shape-decode.cxx:545
> #8 0x000000000040a5f1 in main (argc=4, argv=0x7fff7756f3c8) at
> shape-decode.cxx:920
> (gdb) list *0x000000000041175a
> 0x41175a is in tgChopNormalPolygon(std::string const&, std::string
> const&, TGPolygon const&, bool) (chop-bin.cxx:208).
> 203 SG_LOG( SG_GENERAL, SG_DEBUG, " Bucket min = " << b_min );
> 204 SG_LOG( SG_GENERAL, SG_DEBUG, " Bucket max = " << b_max );
> 205
> 206 if ( b_min == b_max ) {
> 207 // shape entirely contained in a single bucket, write
> and bail
> 208 clip_and_write_poly( path, index, poly_type, b_min,
> shape, preserve3d );
> 209 return;
> 210 }
> 211
> 212 SGBucket b_cur;
>
>
> This happens with the following shapefile:
> http://www.mguillaud.net/fg/fg_railways.tgz
> Note that I can run some other shapefiles through shape-decode without
> problem. That particular file was generated by PostGIS using pgsql2shp.
> It does not appear to be invalid.
>
> Any advice ?
> Regards,
> Maxime
>
>
>
>
>
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--
Curtis Olson: http://baron.flightgear.org/~curt/
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