I am working with digital versions of paper maps. Here is what I am attempting to do:
- In ArcMap determine the value in a raster's colormap that is the undesired black mask / "no data" section.
- Set that colormap value to no color.
- Repeat this for all the rasters in an area.
At this point the rasters overlay just like I want them to. However, my final step is to use mosaic to new raster GP tool to create a new seamless raster. Here is where everything goes sideways. The original value of the mask area will creep back in and overwrite values.
I tested doing a simple export from ArcMap after my colormap customization and the original colormap always sneaks back in. I can't seem to update the colormap permanently. I would like to avoid to have to laborious task of clipping out the area if possible.
Please avoid bringing up Mosaic datasets I do not have access to an Advanced/Standard license.