I am using GDAL library routines to build a tiled hierarchy of images for use with
Google Earth. The images are just PNG files created using Matplotlib. To tile the images, we are using
gdal2tiles.py. When using the Macports installation of GDAL (installed via
sudo port install gdal, everything works beautifully, and the tiled hierarchy is created and loads into Google Earth. But for reasons I don't understand, the Anaconda installation is giving us an error.
Here is the results of
gdalinfo on a typical PNG file that we produce :
% gdalinfo plot.png Driver: PNG/Portable Network Graphics Files: plot.png Size is 2400, 2400 Coordinate System is `' Image Structure Metadata: INTERLEAVE=PIXEL Corner Coordinates: Upper Left ( 0.0, 0.0) Lower Left ( 0.0, 2400.0) Upper Right ( 2400.0, 0.0) Lower Right ( 2400.0, 2400.0) Center ( 1200.0, 1200.0) Band 1 Block=2400x1 Type=Byte, ColorInterp=Red Mask Flags: PER_DATASET ALPHA Band 2 Block=2400x1 Type=Byte, ColorInterp=Green Mask Flags: PER_DATASET ALPHA Band 3 Block=2400x1 Type=Byte, ColorInterp=Blue Mask Flags: PER_DATASET ALPHA Band 4 Block=2400x1 Type=Byte, ColorInterp=Alpha
The image we are loading is assumed to be in lat/lon coordinates.
When we use the Macports installation of
gdal_translate, things work :
/opt/local/bin/gdal_translate -of VRT -a_srs EPSG:4326 -gcp 0 0 -120 0 -gcp 2400 0 -60 0 -gcp 2400 2400 -60 -60 -90 plot.png plot_tmp.vrt Input file size is 2400, 2400
plot_tmp.vrt is created, and can be used by
However, the same call to the Anaconda installation of
gdal_translate gives us an error :
/anaconda/bin/gdal_translate -of VRT -a_srs EPSG:4326 -gcp 0 0 -120 0 -gcp 2400 0 -60 0 -gcp 2400 2400 -60 -60 -90 plot.png plot_tmp.vrt ERROR 6: EPSG PCS/GCS code 4326 not found in EPSG support files. Is this a valid EPSG coordinate system? Failed to process SRS definition: EPSG:4326
GDAL_DATA set to an existing file
gcs.cvs (although this doesn't seem to matter, as the MacPorts installation doesn't need this file).
I have exactly the same installed versions in both cases :
/anaconda/bin/gdal_translate --version GDAL 1.11.2, released 2015/02/10 /opt/local/bin/gdal_translate --version GDAL 1.11.2, released 2015/02/10
Is the Anaconda installation broken? Or is it making assumptions that the MacPorts version isn't? Or, maybe the Macports version is picking up something in my PATH that the Anaconda version isn't?
We would like to build these tiling capabilities into a visualization package were are developing, and don't want users to have to rely on one installation over the other (especially since we tell users to install Anaconda Python!)
(I apologize for the cross-posting this question, but I just now discovered this stack-exchange site, and don't yet know how to migrate my question).