How GDL Works - geographicdeterminationlibrary - 2024.00

Geographic Determination Library Reference for Windows and z/OS

Product type
Software
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Product family
GeoStan Geocoding Suite
Product
GeoStan Geocoding Suite > Geographic Determination Library
Version
2024.00
Language
English
Product name
GeoStan Geocoding Suite
Title
Geographic Determination Library Reference for Windows and z/OS
Topic type
Reference
Copyright
2024
First publish date
1994
ft:lastEdition
2024-05-09
ft:lastPublication
2024-05-09T00:55:21.277227

The Geographic Determination Library allows you to determine a geographic region that describes the maximum probable variance associated with the geocode. This geographic region is referred to as a geo-variance buffer or surface. Once you have this surface area created, there are a number of functions available in GDL that allow you to make comparisons between it and other geographic features.

There are essentially two types of comparisons available to you, near/far distance comparisons and polygon overlap comparisons. Distance comparisons are useful when you need to determine with great confidence whether or not an address is located within a certain distance of another feature. Polygon overlap comparisons are useful for determining whether or not your geocoded address is located within another polygon.