[gdal-dev] gdal_contour stuck in processing?

[Chaitanya kumar CH]

Graeme,

Can you provide a small sample image for testing?

On Mon, Oct 24, 2011 at 9:20 AM, Graeme Merrall <graeme at inetix.com.au>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 <graeme at inetix.com.au>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 <
>> chaitanya.ch at gmail.com> wrote:
>>
>>> Graeme,
>>>
>>> Can you try again with a much larger interval?
>>>
>>> On Thu, Oct 13, 2011 at 6:32 AM, Graeme Merrall <graeme at inetix.com.au>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
>>>> gdal-dev at lists.osgeo.org
>>>> 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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