[gdal-dev] Q: on gdalwarp of ecw file

[Stephen Woodbridge]

On 12/17/2012 4:54 PM, Even Rouault wrote:
>>
>> $ gdalwarp -t_srs EPSG:900913 -of ECW Saraji_South.ecw
>> Saraji_South-900913.ecw                                    Output driver
>> `ECW' not recognised or does not support
>> direct output file creation.  The following format drivers are configured
>> and support direct output:
>> ...
>> JP2ECW: ERDAS JPEG2000 (SDK 3.x)
>> ...
>>
>> but ECW is not in the list. Am I doing this wrong?
>
> Nothing, but ECW does not support the Create() interface needed by gdalwarp.
> You could gdalwarp to a VRT file and then gdal_translate it into ECW
>
>>
>> If I try this on my file:
>>
>> ls -lh Saraji_South.ecw
>> -rw-r--r-- 1 woodbri woodbri 220M 2012-12-17 10:47 Saraji_South.ecw
>>
>> $ gdalwarp -t_srs EPSG:900913 -of JP2ECW Saraji_South.ecw
>> Saraji_South-900913.jp2
>> Creating output file that is 34551P x 32332L.
>> Processing input file Saraji_South.ecw.
>> 0ERROR 1: ECW SDK 500MB compress limit exceeded.
>> ERROR 1: ECW SDK 500MB compress limit exceeded.
>> ERROR 1: ECW SDK 500MB compress limit exceeded.
>> ERROR 1: An error occured while writing a dirty block
>> ERROR 1: Saraji_South-900913.jp2, band 2: An error occured while writing
>> a dirty block
>> ERROR 1: Saraji_South-900913.jp2, band 3: An error occured while writing
>> a dirty block
>>
>> ok, so this must mean the uncompressed file needs to be less than 500MB.
>
> Yes, and using JP2ECW driver with .ecw extension probably confuses the driver
> on whether you want ECW or JPEG2000
>
>>
>> Second problem, when I try to convert it to a tif it always dies like this:
>>
>> $ gdalwarp -t_srs EPSG:900913 -of GTiff -co TILED=YES -co COMPRESS=JPEG
>> -co PHOTOMETRIC=YCBCR Saraji_South.ecw Saraji_South-900913.tif
>> Creating output file that is 34551P x 32332L.
>> Processing input file Saraji_South.ecw.
>> 0...10...20..ERROR 1: Could not perform Read/Write on file
>
> Hum, did you check if you have enough disk space ?
>
target disk has 200GB but maybe the /tmp is small, is there a way to set 
an environment variable to open tmp file elsewhere?

-Steve