New Coordinate System for small scale Rasters?

Discussion created by jcc5 on Jan 3, 2014
Latest reply on Jan 9, 2014 by GSCUser85
Hey all--
I'm fairly new to Arc, sorry if this is overly simple.

I'd like to work with raster files that cover a very small area- 512 by 512 microns. How do I create a custom coordinate system to manipulate these files? Is it possible in Arc?