iCOR Coordinate System in SNAP


#1

Hello all!

I’ve managed to process a Sentinel-2 image with iCOR on SNAP 6.0 after installing the patch, however, it doesn’t look like SNAP is recognizing the coordinate system of the processed image.

With this I cannot extract the pixel values, is there any workaround to this problem?


#2

It seems that iCOR doesn’t write a CRS to any of the output TIFFs, but they do retain knowledge of pixel size/origin coordinate, etc.

One can “Assign Projection” with QGIS (using the same EPSG as the input tile) and it should then appear in the expected location.

@icor, can this pleased be fixed to happen automatically with iCOR, or is there a setting that we are missing?


#3

Did you try to output the icor process to a BEAM DIMAP format first and then exporting to GeoTiff in a second step?


#4

Thanks for the suggestion, Andreas, but it seems that iCOR will always output TIFFs and doesn’t seem to adhere to SNAP’s target product writer, if provided.


#5

oh, I didn’t know that. I just remembered that in some cases reported here, direct output to *tif products resulted in loss of metadata.

As another workaround: You could download the projection file for your results here and name them exactly as the output products. Then the projection of the rasters will be identified when opening them in a GIS: http://spatialreference.org


#6

ICOR copies the projection information from the input file. Normally there should be therefore no issue with the projection.

Therefore we advise to check

  1. if the input image contains the projection information

  2. check if gdal-data directory is set in the environmental variables; it is best that this gdal-data directory is the ICOR one (i.e. …iCOR\bin\ac_runner\gdal_data )

  3. check if the gdal-data directory effectively exists

The iCOR-team