GEOCODING Creates map features from addresses or placenames

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GEOCODING • Creates map features from addresses or place-names. • Converts a name or

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 – Database containing records representing the geometry of street segments

REQUIREMENTS • Reference Data – 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

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.

EXAMPLE 950 West Broadway – In the 900 block – On the even-numbered side

EXAMPLE 950 West Broadway – 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 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 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 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

LOCAL GEOCODING EXAMPLES Microsoft Virtual Earth Ex: Sunburst Drive, El Cajon, 1697 CA 92021

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

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

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

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