Open-source mapping being used to help first responders in Puerto Rico

AUSTIN (KXAN) — Satellite images of rural towns, sprawling woodlands and grooved mountainsides fill the computer screens as homeowners and students scroll across digital maps.
This group of a few dozen people gathered on Friday at the Perry Castenada Library on the University of Texas at Austin campus for a four-hour disaster relief mapathon to bolster humanitarian efforts in Puerto Rico, where 91 percent of the island is still without electricity, and Mexico, which was ravaged by a 6.1 ea