GIS Data Resources, Inc. (GDR)
GIS Data Resources, Inc. (GDR) is a private company that offers custom-built GIS data for private and public entities. They use their data archive of U.S. parcels, satellite and aerial imagery, tax assessor information and other location-based datasets to provide good information to organizations such as Police, Fire, and EMS Departments. Many companies that deal with telecommunications, real estate, insurance and utilities also benefit from the data.
GDR has put together a highly precise dataset, called Addresspoints, which can be used to provide both precise routing to a building location as well as site-specific intelligence. Addresses are individually located by point and building structure on each map (not just estimated or geocoded), to display every structure in its actual location via a rooftop point.
The company makes their data and services available for a fee.