You can download it from http://dl.dropbox.com/u/5657619/dtm.tif Only 9.6Mb
Cheers, Graeme On Mon, Oct 24, 2011 at 3:02 PM, Chaitanya kumar CH <[email protected]>wrote: > 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 >
_______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
