How to crop collar of multiple GeoTIFFs

[markrichards1988]

I am trying to create a mosaic of GeoTIFFs of an area. I have multiple files to splice together but they all include a collar which include legend, lat/long info, etc.. What is the best way to crop the files to just a map area?

[DavidPike]

I would add these tiffs to a Mosaic Dataset (if not done already), then adjust the footprints, either manually diting or using the 'shrink' tool. - Mosaic dataset footprints—Help | ArcGIS for Desktop

[markrichards1988]

ok that got me on the right path. Only problem is the collars are mostly white (which i can take out by reducing max value from 255) but there is a significant amount of white in the image that I would like to keep. When I apply Rediometry filter I get a whole bunch of little footprints that attempt to cut all the white areas out. 

So this I guess leads to the manually editing footprint. How do I do that?

[DavidPike]

As you say, the radiometry is only really useful if you have a common pixel value to exclude.

In ArcMap I would go to the edit toolbar -> start editing 'footprint' and edit the shape. Ensure that the properties of the mosaic dataset -> default -> image properties have 'always clip raster to it's footprint' is selected as 'yes'.  I'd imagine the Pro workflow is similar.  You could also use the shrink tool I guess.