Advanced Geocoding

Advanced Geocoding

• Most of advanced geocoding work involves prepping the street and student file BEFOREHAND.

Steps to improving matched records:

• Fix obvious problems first

• Standardize student and street file using the same address locator style.

• Download and use the address locator for PARSED addresses.

Advanced Geocoding

Fix Obvious Problems First

• Use Excel or your student records system to fix student addresses before geocoding

• Fix spelling errors

• Change Apt 210 to #210

• Spell out abbreviations in student table similar to street dataset (i.e MLK to Martin Luther King, Jr.)

Digitize new streets and add address ranges.

Advanced Geocoding

Standardize Student File:

• Convert student file to a table in a GDB

• Use ArcToolBox to Standardize Addresses

Advanced Geocoding

Standardize Student File:

• Create new output file with parsed address fields.

Now You Try! Standardizing the Student File

Advanced Geocoding

Standardize Street File:

• Streets must be a feature class inside a GDB.

• Use ArcToolBox to Standardize Addresses

• Use Input Address Fields: Object-ID and full address field!

Advanced Geocoding

• Choose US Streets Locator style

• Do NOT output a HouseNum field. (Used to correctly parse street name only.)

Standardize Street File:

Advanced Geocoding

• Resulting Street Fields:

• New fields are indicated by the header prefix ADDR_.

Now You Try: Standardizing the Street File

Advanced Geocoding

• Download the address locator for PARSED addresses:

• Go to http://forums.esri.com /Thread.asp?c=93&f= 1113&t=70664#187440 and download the 4071.lot address locator.

• Save the file to C:\Program Files\ArcGIS\Locators.

• Rename the 4071.lot file to “US Streets (GDB) parsed address file.lot”.

This customized address locator allows ArcGIS to USE parsed addresses for geocoding.

Today, this has already been done for you!

Advanced Geocoding

• Now, you can begin geocoding....

• In ArcCatalog, create a new address locator. Choose the US Streets (GDB) Parsed address file you just downloaded.

Advanced Geocoding

• Browse for your parsed street file.

Now You Try: Create An Address Locator

Advanced Geocoding

• Once In ArcMap...

• Begin a geocoding session as normal. Notice the address input fields can handle parsed information in the student table.

Now You Try: Geocode Addresses

Advanced Geocoding

• Fixing Unmatched Students:

• Select unmatched and summarize by street name.

• Add “OD” field and mark out-of-district students.

• Rebuild street index if you make edits:

• Find more information in the Geocoding User Guide

This will update your address locator and allow you to geocode using the latest

edits. A new file will appear in your

GDB (i.e. GC_SS7). Do not delete – this file contains the

street index needed to complete geocoding.

Advanced Geocoding

Fixing Errors

In the Beginning Geocoding class, you learned how to fix student record errors. Here you will learn how to fix:

•Duplicate street address ranges

•Non-existent street addressesand

•When to re-build the street index file

Now You Try: Fix Street Errors