Stephanie Crowe, recruiting director at Montana Tech in Butte, displays a colorful, eye-catching Montana map and United States map signifying potential students who visit campus.

While some of his maps are based on old Montana Fish, Wildlife and Parks or USGA data sets, Reller, of Helena, does most of his mapping with his own four-boat fleet and GPS linked to sonar.

A recently produced map showing 18.6 million acres of land in Montana possibly being used by hunting outfitters — more than twice what has previously been reported — has drawn ...