Hi Peoples,
I have a number of ECW rasters that contain an alpha band that acts as a transparency mask.
I would like to calculate footprints for the rasters. I can't see how to specify to use just the value of the alpha band to achieve this. Anyone done this?
https://pro.arcgis.com/en/pro-app/latest/help/data/imagery/raster-display-ribbon.htm
Cheers,
Mark
Solved! Go to Solution.
Hello Mark,
Yes this can be achieved. I have utilised raster functions to do this. Usually the alpha channel is 0 & 255.
So what you do is as follows:
Hopefully this is what you are after. You can even use this shape to replace the footprints in a Mosaic dataset
Cheers
Gordon
Hello Mark,
Yes this can be achieved. I have utilised raster functions to do this. Usually the alpha channel is 0 & 255.
So what you do is as follows:
Hopefully this is what you are after. You can even use this shape to replace the footprints in a Mosaic dataset
Cheers
Gordon
Thanks Gordon. As I was using .ecw the Extract Bands gave a result that was not 0 or 1. I got around this by doing a Reclass. Using the GP Raster to Polygon on the reclassed raster gave the footprint. I could then simplify and shrink as required.