Haven't been able to find an app for Android that will track chemical sprayer coverage across the field. So I will write one.

Any ideas on how to get the regular android map & gps system to highlight part of a map when it has been covered by the sprayer? (Probably make an input to put in sprayer width.)

Also how would I get the color to change with sprayer overlap?

Ideas? Any similar packages out there that anyone can think of with map tracking and map highlighting?