Introduction to GIS

1
Introduction to GIS

• Address Geocoding

2
Class Discussion

• Address Geocoding
• Reference Tables
• Taking street addresses as text and applying
  geography to them
• Georeferencing address data
• Creating feature class from table containing
  addresses

3
Finding Reference Tables

• Purchase from data companies
• U.S. Bureau of the Census
• ESRI

4
Information needed

• Table with addresses
• Street feature class with street segments
  identified with addresses per segment
• Special database Reference Table
• Address locator search tool
• What information do you have about your address?
• What field should be matched?

5
Address Geocoding

• Logic steps
• Identify table of addresses with no
  georeferening information
• Identify street feature class (Reference)
• Create Address locator
• Match addresses to georeferenced street segments
  in street feature class
• Hand match unmatchable few

6
Identify Reference feature class

• Specific Street feature class database
• Segments and address ranges per side of street
  are identified

7
Create Address Locator

• Process starts in ArcCatalog, but is used in
  ArcMap

8
Identify type of data addresses have

• Each address locator is built for different data
  options.
• Just addresses? Addresses with zip codes?...
• Select (File) option

9
Name and type of address locator
Browse to location of street reference table
Confirm field names for address segments
Confirm field name of street name in street
reference table
10
Confirm field name of street name in table to be
geocoded
Select selection sensitivity for search
11
New address locator is now listed and can be used
to geocode any table with the same format.
12
Can now Find an address
In ArcMap
13
Match address table to Reference feature class

• Match non-georeferenced addresses to address
  ranges of reference table
• Logic
• Complete geocode dialog box
• Geocode data
• Correct unmatchable Match interactively

14
Activate Geocoding
1.
2.
15
3.
Identify address table and field name for street
data
Save to a Safe Place
Sensitivity selections
16
Geocode Results
17
Re-matching
18
Re-match options
Correct by hand
Change sensitivity
19
Now matched address
Does not change in database
20
New Feature class of geocoded addresses
21

• Questions/Demo