[gdal-dev] gdal2tile

[Even Rouault]

Le lundi 24 août 2015 06:35:53, Mike Manning a écrit :
> Hi guys,
> 
> 
> 
> I've got an interesting one - I have some GeoTIFF Files that I've converted
> to EPSG:3857 from GeoStationary as follows:
> 
> 
> 
> # gdalwarp -tr 2000 2000 -co tfw=yes -t_srs epsg:3857 -te 10018754.17
> -7361866.11 20037508.34 -0.00
> /storage/sat_data/20150824/IDE00422.201508240100.tif
> /storage/tmp/IDE00422.201508240100.tif
> 
> 
> 
> Using gdalinfo reveals the following about the newly created GeoTIFF file:
> 
> 
> 
> # gdalinfo IDE00422.201508240100.tif
> 
> Driver: GTiff/GeoTIFF
> 
> Files: IDE00422.201508240100.tif
> 
> Size is 5009, 3681
> 
> Coordinate System is:
> 
> PROJCS["WGS 84 / Pseudo-Mercator",
> 
>     GEOGCS["WGS 84",
> 
>         DATUM["WGS_1984",
> 
>             SPHEROID["WGS 84",6378137,298.257223563,
> 
>                 AUTHORITY["EPSG","7030"]],
> 
>             AUTHORITY["EPSG","6326"]],
> 
>         PRIMEM["Greenwich",0],
> 
>         UNIT["degree",0.0174532925199433],
> 
>         AUTHORITY["EPSG","4326"]],
> 
>     PROJECTION["Mercator_1SP"],
> 
>     PARAMETER["central_meridian",0],
> 
>     PARAMETER["scale_factor",1],
> 
>     PARAMETER["false_easting",0],
> 
>     PARAMETER["false_northing",0],
> 
>     UNIT["metre",1,
> 
>         AUTHORITY["EPSG","9001"]],
> 
>     EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0
> +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext
> +no_defs"],
> 
>     AUTHORITY["EPSG","3857"]]
> 
> Origin = (10018754.169999999925494,0.000000000000000)
> 
> Pixel Size = (2000.000000000000000,-2000.000000000000000)
> 
> Metadata:
> 
>   AREA_OR_POINT=Area
> 
> Image Structure Metadata:
> 
>   INTERLEAVE=BAND
> 
> Corner Coordinates:
> 
> Upper Left  (10018754.170,       0.000) ( 90d 0' 0.00"E,  0d 0' 0.01"N)
> 
> Lower Left  (10018754.170,-7362000.000) ( 90d 0' 0.00"E, 55d 0' 2.48"S)
> 
> Upper Right (20036754.170,       0.000) (179d59'35.61"E,  0d 0' 0.01"N)
> 
> Lower Right (20036754.170,-7362000.000) (179d59'35.61"E, 55d 0' 2.48"S)
> 
> Center      (15027754.170,-3681000.000) (134d59'47.81"E, 31d22'14.91"S)
> 
> Band 1 Block=5009x1 Type=Byte, ColorInterp=Gray
> 
> 
> 
> It looks like the map has the correct coordinates however when I run the
> gdal2tiles program it errors out:
> 
> 
> 
> gdal2tiles.py -k -g <api_key> IDE00422.201508240100.tif mercour
> 
> 
> 
> ERROR 6: EPSG PCS/GCS code 900913 not found in EPSG support files.  Is this
> a valid
> 
> EPSG coordinate system?
> 
> ERROR 6: No translation for an empty SRS to PROJ.4 format is known.
> 
> ERROR 6: No translation for an empty SRS to PROJ.4 format is known.
> 
> Generating Base Tiles:
> 
> ERROR 5: Illegal values for buffer size
> 
> ERROR 5: Illegal values for buffer size
> 
> Traceback (most recent call last):
> 
>   File "/usr/bin/gdal2tiles.py", line 2262, in <module>
> 
>     gdal2tiles.process()
> 
>   File "/usr/bin/gdal2tiles.py", line 478, in process
> 
>     self.generate_base_tiles()
> 
>   File "/usr/bin/gdal2tiles.py", line 1276, in generate_base_tiles
> 
>     dsquery.WriteRaster(wx, wy, wxsize, wysize, data,
> band_list=list(range(1,self.dataBandsCount+1)))
> 
>   File "/usr/lib/python2.7/dist-packages/osgeo/gdal.py", line 796, in
> WriteRaster
> 
>     buf_pixel_space, buf_line_space, buf_band_space )
> 
> TypeError: not a string
> 
> 
> 
> I'm running "GDAL 1.10.1, released 2013/08/26" on Debian Jessie.  I've read
> that version 1.6 had this issue as it didn't know what EPSG:3857 is but I'm
> running 1.10 so it can't be that.

Mike,

apparently this is due to Debian packaging of GDAL where one ressource file 
that contains the definition of EPSG:900913 has been removed. See
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=745702 and confirmed by 
https://packages.debian.org/jessie/i386/libgdal1h/filelist

2 possible workarounds :
- download https://svn.osgeo.org/gdal/trunk/gdal/data/cubewerx_extra.wkt and 
copy it to /usr/share/gdal/1.10 so as to get 900913
- edit /usr/bin/gdal2tiles.py and replace all occurences of 900913 by 3857

Even

> 
> 
> 
> Cheers, Mike

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