Irvine-based Digital Map Products, a provider of geographical information systems (GIS) products, reported this week that it has signed on Union City, California, as a customer. According to Digital Map Products, Union City is using its product to collect and share GIS data among its departments and with the public. Financial details of the win were not disclosed. Digital Map Products is headed by Jim Skurzynski. The firm has previously raised funding from the Keiretsu Forum and TVC Ventures.