The U.S. geocoding databases contain the spatial data necessary to perform address standardization and geocoding. You must install at least one of these databases.
- Centrus Enhanced Geocoding—This database consists of TIGER data provided by the U.S. Geological Survey and address data provided by the U.S. Postal Service.
- TomTom Geocoding—This database provides more up-to-date data than the Centrus
Enhanced Geocoding database. It requires an additional license. The data is
provided by TomTom, a third-party provider of spatial data, and postal data from
the U.S. Postal Service.
- NAVTEQ Geocoding—This database provides more up-to-date data than the Centrus Enhanced Geocoding database. It requires an additional license. NAVTEQ data is provided by NAVTEQ, a third-party provider of spatial data. For more information about these databases, contact your sales representative.
- ZIP + 4 Centroid—This database provides only address standardization and ZIP + 4 centroid matching. It does not provide street-level matching.
These databases use proprietary files called GSD files. For ZIP Code centroid matching, the
file us.Z9 contains all the centroid info for all states and normally has a z9
Each geocoding database has an optional Statewide Intersections Index. The Statewide
Intersection Index is designed to enable fast intersection identification on a
statewide basis. For example, the Statewide Intersection Index will allow the
database to search for "1st and Main St, CO" and return a list of possible matches
in Colorado more quickly than searching the entire geocoding database for each
instance of the intersection.
Note: To install the Enterprise Geocoding Module databases on Windows Server 2008 you need administrator privileges.