Geographical Event Mapping System

Overview
The State of California's Geographical Event Mapping System (GEMS) monitors law enforcement activities and increases officer safety by plotting event locations on county maps, and detecting possible conflicts between enforcement operations. This allows centers to map law enforcement events, and do analysis to see if a conflict exists.

Source

 * Visualizing California: A Strategy for Enhanced Decision-making Tools for Public Policy Makers and the Public, App. D, at D-14.