Beginning Geocoding

1
Beginning Geocoding
2
Beginning Geocoding

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

3
Beginning Geocoding

• 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)

4
Beginning Geocoding
Matching and Scoring Address Components
Address 380 New York Street Reference
theme Score LeftFrom LeftTo
RightFrom RightTo StreetName Type
SufDir
Missing component results in lower match score
5
Beginning Geocoding

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

6
Beginning Geocoding

• Create a New Address Locator
• An address locator converts textual descriptions
  of locations into geographic features.
• Automatically builds a geocoding index.
• Create in ArcCatalog

7
Beginning Geocoding

• 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!!

8
Beginning Geocoding

• 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

9
Beginning Geocoding

• 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!!

10
Beginning Geocoding

• Interactive Review Dialog Window

11
Beginning Geocoding
Matching and Scoring Address Components
Address (ArcView interprets as) 380 House
number New York Street name Street Street
type Reference theme Score LeftFrom
LeftTo RightFrom RightTo StreetName
Type SufDir
Missing component results in lower match score