The FAIMS Mobile App 1 displays a black pane instead of a well rendered geotiff when I try to import files directly from ArcGIS 10.1 instead of processing them through gdal and grass.
Running gdalinfo, the major difference between pre and post processing with GRASS is the presence of:
Band 1 Block=256x256 Type=UInt16, ColorInterp=Palette Color Table (RGB with 65536 entries) 0: 5,5,5,255 1: 5,5,5,255 ... 65534: 0,0,0,255 65535: 0,0,0,255
The ArcGIS produced Geotiffs by our resident mapping person do not have this, unfortunately.
I know a limitation of the Nutiteq rendering engine the app uses requires either this color palette or the kind of tiff that shows up normally when viewed with a normal image viewer.
Our normal prep methodology is kind of painful, and I'm wondering if there isn't a simpler solution.
Is there a way to force ArcGIS to generate a geoTIFF that:
- Is in the required projection for display (EPSG:3857),
- equivalent to -co TILED=YES (I know tiled means many different things, so this is the tiled of gdalwarp)
- And has a written colour pallette for the UInt16 that it needs?
1Fair disclosure, I'm one of the FAIMS project leads.