GeoStan performs geocoding based on address data. A geocode, i.e., the latitude/longitude coordinates associated with an address, can have one of four basic levels of quality associated with it. This quality level is determined by the address information provided and the data available in a data look-up table.
GDL uses this quality level to create a polygon or geo-variance buffer around the geocoded point. This polygon describes the maximum probable geographic variance that point may have. For example, an address level geocode may have a variance of +/- 165 feet East/West and +/-50 feet North/South. The geo-variance polygon outlines the boundary of this 33,000 square foot area. Once this buffer has been calculated, it can be compared to other spatial objects for accurate determinations.