Graeme, Can you provide a small sample image for testing?
On Mon, Oct 24, 2011 at 9:20 AM, Graeme Merrall <[email protected]>wrote: > Correction, the cmdline was "gdal_contour -a ELEL -i 10.0 dtm.tif > dtm-10m.shp" > > > > On Mon, Oct 24, 2011 at 1:58 PM, Graeme Merrall <[email protected]>wrote: > >> Apologies for the delay in replying. >> >> I ran the same command with 10m spacing "gdal_contour -a ELEL -i 1.0 >> dtm.tif dtm-10m.shp" and the same issue occurred. I also ran the DTM >> through gdal_translate to add projection info just in case. Note this is >> gdal_1.8.1 running on Ubuntu Lucid not from deb's but a custom compile >> >> The same symptoms occur, it gets to around 7% or so then hangs. Load goes >> through the roof. >> >> Ran it through strace and seems to get stuck in massive loop with calling >> brk() >> >> Cheers, >> Graeme >> >> On Thu, Oct 13, 2011 at 4:03 PM, Chaitanya kumar CH < >> [email protected]> wrote: >> >>> Graeme, >>> >>> Can you try again with a much larger interval? >>> >>> On Thu, Oct 13, 2011 at 6:32 AM, Graeme Merrall <[email protected]>wrote: >>> >>>> I'm trying out gdal_contour just to see what falls out of it as an >>>> experiment. I've noticed it seems to get to "0.." e.g. 7% or so, and >>>> then seems to hang. I'm trying it on a relatively small DTM >>>> >>>> The cmdline is pretty simple "gdal_contour -a ELEL -i 1.0 >>>> dtm_11072101.tif dtm-1m.shp" >>>> >>>> and gdalinfo gives the following info about the image >>>> Driver: GTiff/GeoTIFF >>>> Files: dtm_11072101.tif >>>> dtm_11072101.tfw >>>> Size is 1000, 2500 >>>> Coordinate System is `' >>>> Origin = (488000.000000000000000,7198000.000000000000000) >>>> Pixel Size = (2.000000000000000,-2.000000000000000) >>>> Metadata: >>>> TIFFTAG_XRESOLUTION=200 >>>> TIFFTAG_YRESOLUTION=200 >>>> TIFFTAG_RESOLUTIONUNIT=3 (pixels/cm) >>>> Image Structure Metadata: >>>> INTERLEAVE=BAND >>>> Corner Coordinates: >>>> Upper Left ( 488000.000, 7198000.000) >>>> Lower Left ( 488000.000, 7193000.000) >>>> Upper Right ( 490000.000, 7198000.000) >>>> Lower Right ( 490000.000, 7193000.000) >>>> Center ( 489000.000, 7195500.000) >>>> Band 1 Block=1000x2 Type=UInt32, ColorInterp=Gray >>>> >>>> I admit I'm at a loss as to how to proceed/troubleshoot so any >>>> pointers gratefully received. I tried popping it through >>>> gdal_translate to add a projection but it seems to have the same issue >>>> >>>> Cheers, >>>> Graeme >>>> _______________________________________________ >>>> gdal-dev mailing list >>>> [email protected] >>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>> >>> >>> >>> >>> -- >>> Best regards, >>> Chaitanya kumar CH. >>> >>> +91-9494447584 >>> 17.2416N 80.1426E >>> >> >> > -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E
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