Understanding User Dictionary capabilities and requirements

The capabilities of User Dictionaries and the basic requirements for creating them are as follows

• All fields supported by normal street geocoding can be included in User Dictionaries.
• Landmarks and place names are supported in User Dictionaries. Postal or geographic centroid geocoding are not supported in User Dictionaries.
• User Dictionaries support address browsing using partial street names or landmarks and place names.
• GSDs are necessary to create the User Dictionary. This is because the GSDs have some internal structure that must be available when creating a User Dictionary.

The results from a User Dictionary are similar to that from the GSD. For address matches where the first letter of the match code would be 'S', a User Dictionary match has the letter 'J'. For example: SE9 is a match code for a match that comes from a GSD, while JE9 is for a match that comes from a User Dictionary. For more information, see the match code descriptions in Match Codes for U.S. Geocoding.

The output field, StreetDataType, returned in the Default Output group, indicates if a User Dictionary was used to geocode the address by returning User Dictionary.