GEOCODING Creates map features from addresses or place-names. Converts a name or description of a location to spatial data Usually converted into point features Geocoding provides the capability to input into GIS a database that contains addresses without any other coordinate data

REQUIREMENTS Reference Data Address Table Address Locator Database containing records representing the geometry of street segments between consecutive intersections, and the address ranges on each side of each segment. Address Table A list of addresses that you want to input into GIS that are stored as a database table or a text file. Address Locator File that specifies: The reference data and its relevant attributes The relevant attributes from the address table Various geocoding rules and tolerances Different styles for reference data with different attributes. Each style requires that certain attributes be present in the address table as well.

HOW IT WORKS Street segment record is located in the search. Location within the street segment is estimated. Estimation is based on linear interpolation within the address range.

950 West Broadway EXAMPLE In the 900 block On the even-numbered side of the street Between address 900 and 998 = 50/98 = 51.02% of the distance from the start of the segment to the end. Assumptions Addresses are numbered sequentially and in order. Addresses are spaced evenly. 950 900 West Broadway 998

LOCAL GEOCODING EXAMPLES NATIONAL GEOGRAPHIC MAP MACHINE Ex: Sunburst Drive El Cajon, CA 92021

LOCAL GEOCODING EXAMPLES Microsoft Streets and Trips Ex: Sunburst Drive, El Cajon, CA 92021

LOCAL GEOCODING EXAMPLES Google Earth Ex: Sunburst Drive, El Cajon, CA 92021

LOCAL GEOCODING EXAMPLES Microsoft Virtual Earth Ex: Sunburst Drive, El Cajon, CA 92021

LOCAL GEOCODING EXAMPLES Microsoft Virtual Earth Ex: Sunburst Drive, El Cajon, CA 92021 (multiple addresses) 1697 1648 1639 1623 1632 1611 1615 1600 1602 1601

LOCAL GEOCODING EXAMPLES Microsoft Virtual Earth Ex: Birdsong Place, El Cajon, CA 92021