Geocoding Basics

Getting Started Understanding the theory Create Address Locator Geocode Introduction to more advanced methods

Geocoding Basics What is geocoding? Definition – The process of converting an address to a specific point location on a map. Gathering data Streets (Reference data) Table of student information (Address table)

Geocoding Basics Matching and Scoring Address Components Address380 New York Street Reference theme Score LeftFrom LeftTo RightFrom RightTo StreetName Type SufDir 75 N NEW YORK ST Missing component results in lower match score

Geocoding Basics The Geocoding Process Create a new address locator Geocode addresses in a table Rematch addressees interactively

Geocoding Basics Create a New Address Locator An address locator converts textual descriptions of locations into geographic features. Created in ArcTool Box

Geocoding Basics Create Address Locator Choose an address style Pick a primary reference table Modify address locator properties Set a 30 foot side offset and 3% end offset!!

Geocoding Basics Geocode Addresses: Geocode in ArcMap Choose an address locator Specify the fields to use in the student address table Name the output feature class Begin geocoding

Geocoding Basics Rematch Addressees Interactively Open ArcMap to review addresses geographically. Can also rematch in ArcCatalog. Start editing Modify and select candidates No need to save map document!!

Geocoding Basics Interactive Review Dialog Window

Geocoding Basics Matching and Scoring Address Components Address(ArcView interprets as) 380 House number New YorkStreet name StreetStreet type Reference theme Score LeftFrom LeftTo RightFrom RightTo StreetName Type SufDir 75 N NEW YORK ST Missing component results in lower match score