When law enforcement personnel think of geographical information systems (GIS), they usually think of maps. But maps are just one of the many varied layers that can be generated by current software. On the topic of traditional maps, the GIS administrator for Sandy City, UT, Ray Montgomery, said, "They're snapshots. A printed map is always out of date. That's what's so bad about maps."

But nobody has to worry about out-of-date maps in Sandy City. The employees there are currently using ArcGIS software developed by Environmental Systems Research Institute (ESRI). ESRI holds about 40% of the market share for GIS software in the United States, a dominant position in the field, and it has an ...

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