Geographic Information Systems (GIS) Services

Address matching

Address matching, also called geocoding, is the process of relating an address to a geographic location (such as latitude/longitude coordinates) or geographic area (such as census tract, block group, block, or ZIP code). The sites listed below provide online geocoding services.

• Excel Geocoding Tool from Juice Analytics. This great tool allows for geocoding inside an Excel spreadsheet.
  
  
• Free Multi-Address Geocoder: "Our free service will bulk geocode your addresses and plot them on a map, right in your web browser! Now you can take many addresses and geocode them all at once, rather than one at a time. BatchGeocode.com also provides a more accurate geocoding dataset than others, most of which use TIGER data, which is known to be inaccurate up to several hundred feet in some areas. Yahoo's Geocoding API which this site uses is based on NAVTEQ (formally NAVTECH) and TeleAtlas street data, both well known as industry standards for transportation data." This service uses the Yahoo! REST Geocoding API.
  
  
• American FactFinder select by address. Enter an address and retrieve the corresponding 2000 geographies: state, county, township, census tract, block group, block, voting district, place, congressional district (106th), and state legislative districts. Easy access (through "Go" button and "Reference Maps" options) to a map of that area which can be customized for 1990 (and other) geographies. Data for a chosen geography may also be available.
  
  
• USC GIS Research Laboratory Geocoding. Research-based geocoding software. Also available is a list of other geocoders.