Thanks Jay,
Ideally I would like the data to be in a column of the shapefile output so I
can load it in the database and use it to query. With gdal_polygonize.py
this doesn't seem possible so I was wondering what other options are out
there.
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I have a very large raster file with data in the alpha band. I need to
vectorize it and associate band 4 data with resulting polygons.
Is there anyway to preserve alpha channel data or get that data associated
with vectorized file after using gdal_polygonize.py?
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Frank,
Does the unscale option work as advertised?
I have a raster with offset and scale set.
Driver: GTiff/GeoTIFF
Files: raster.tif
raster.tif.aux.xml
Size is 10295, 7735
Coordinate System is:
PROJCS["unnamed",
GEOGCS["unnamed",
DATUM["North_American_Datum_1983",
.nabble.com]
Sent: Wednesday, July 20, 2011 11:11 PM
To: jt2000
Subject: Re: GDAL unable to recognize large GRC file
John,
Can you provide me the failing file? You can send a link to me alone.
On Thu, Jul 21, 2011 at 4:24 AM, jt2000 <[hidden email]> wrote:
Yes, I'm able to open the
Yes, I'm able to open the raster file in mapinfo.
Turning on the CPL_DEBUG env variable produces the following. It dosn't
seem to help much.
Are there any other methods I can debug this?
The file is about 580MB. Is there a limitation on # of pixels?
ERROR 4: `filename.grc' not recognised as a
/usr/local/bin/pct2rgb.py -rgba raster.grc convert.tif
*Traceback (most recent call last):
File "/usr/local/bin/pct2rgb.py", line 167, in
dst_data = Numeric.take(band_lookup,src_data)
File "/usr/local/lib/python2.7/site-packages/numpy/core/fromnumeric.py",
line 103, in take
return take
I have a large (>500MB) GRC file that is not being read by GDAL correctly.
*[me@server data]$ gdalinfo filename.grc
ERROR 4: `filename.grc' not recognised as a supported file format.
gdalinfo failed - unable to open 'filename.grc'.*
Is this due to the size? I have other 200MB files that work fi
