CRA Wiz & Fair Lending WizGeocoding Basics

August 2017

CRA Wiz & Fair Lending Wiz – Geocoding Basics

CRA Wiz & Fair Lending Wiz Recommended Geocoding Settings & Fall Back Options

Geocoding Match Types

— Parcel Matches

— Street Matches

— Tract Matches

— ZIP Matches

ZIP %

ZIP4

ZIP2

ZIP5

mmwStat Field - Code Descriptions

Centroid Field – Code Descriptions

CRA Wiz Geocoding vs. the FFIEC

8/10/2017 2Confidential For Internal Use Only

CRA Wiz & Fair Lending Wiz – Geocoding BasicsRecommended Settings & Fall Back Matching

Parcel and street level geocoding will attempted first on all records as they are first and second most accurate methods of geocoding records. In the event that a parcel or street match is not possible, the CRA Wiz & Fair Lending Wiz geocoder will attempt the following match strategies (in order below) if they are enabled in your Geocoding Settings.

Recommended Settings Fall Back Options

CRA Wiz & Fair Lending Wiz – Geocoding Basics

Parcel Match

When an address is geocoded to a parcel, the latitude and longitude for the address

is assigned based on the center point of the parcel of land (or sometimes the center point of the structure’s roof. ) Relevant geocoding data points such as state, MSA, county and census tract are assigned based on this location.

mmwStat Code: B1

Centroid Code: NA

Accuracy: Approximately 99%

CRA Wiz & Fair Lending Wiz – Geocoding Basics

Street Match

When an address is geocoded to a street segment, latitude and longitude

information is interpolated for an address based on its position on a street segment. State, MSA, county, census tract data is assigned based on that location.

mmwStat Code: B2

Centroid Code: NA

Accuracy: Approximately 98%

CRA Wiz & Fair Lending Wiz – Geocoding Basics Tract Match

— Multiple segments are returned for the address and all of segments are within a single census tract.

— The street number provided does not match an actual segment, but all segments for the identified street are within a single census tract.

mmwStat Code: B8

Centroid Code: NA

Accuracy: Approximately 98%

CRA Wiz & Fair Lending Wiz – Geocoding Basics

ZIP Match Overview

ZIP Codes are used to identify mail delivery routes and provide a specific geographic region. The region identified becomes more accurate as you progress through the digits of a ZIP Code. A full 9 digit ZIP Code can typically be used to find a very small location which provides enough information for census tract level accuracy.

Example: Malden, MA 02148-7601

Centroiding— Centroiding is the process of identifying the geographical center point of a region.

— In Centroiding the actual location returned in the longitude and latitude does not represent the location of the address, but rather the center point of the ZIP Code that was used.

Types of Centroid available in CRA Wiz— ZIP %

— ZIP4

— ZIP2

— ZIP5

CRA Wiz & Fair Lending Wiz – Geocoding Basics

ZIP % Matching

ZIP % matches are derived from a spatial calculation using ZIP Code and census tract data. The system calculates how much of any particular ZIP Code is physically located within a single census tract.

In the CRA Wiz Geocoding Settings, there are three types of ZIP % matches;

— ZIP 99%

99% of the five digit ZIP Code is located with in the same census tract

mmwStat Code: 14

Centroid Code: A

Accuracy: Approximately 99%

— ZIP 95%

95% of the five digit ZIP Code is located within the same census tract

mmwStat Code: 14

Centroid Code: B

Accuracy: Approximately 95%

— ZIP 90%

90% of the five digit ZIP Code is located within the same census tract

mmwStat Code: 14

Centroid Code: C

Accuracy: Approximately 85%

CRA Wiz & Fair Lending Wiz – Geocoding Basics

ZIP4 Centroid

The four digit extension of a standard USPS ZIP Code translates to a very specific, well defined, geographic area within a five digit ZIP Code. It is represented by all nine digits of a ZIP Code, for example Malden, MA 02148-7601.

If the geocoder is unable to street match a location but can ascertain its nine digit ZIP Code, it will geocode the address to the center point of the geographic area identified by the nine digit ZIP Code.

mmwStat Code: 14

Centroid Code: 4

Accuracy: Approximately 90%

ZIP2 Centroid

The two digit extension of a standard USPS ZIP Code translates to a slightly larger geographic area within a five digit ZIP Code. It is represented by the first seven digits of a ZIP Code, for example Malden, MA 02148-7601.

If the geocoder is unable to street match a location or assign a ZIP4 match to it, it can if configured to do so, geocode the address to the center point of the geographic area identified by the seven digit ZIP Code.

mmwStat Code: 14

Centroid Code: 2

Accuracy: Approximately 68%

CRA Wiz & Fair Lending Wiz – Geocoding Basics

ZIP% Matches

ZIP percentage overlap with census tract 9715.00:•ZIP Code: 03467 is 98.156% overlapped with tract•ZIP Code: 03466 is 99.826% overlapped with tract•ZIP Code: 03443 is 98.740% overlapped with tract

Geocoding Methodology ZIP5 Centroid

This match strategy uses the five digit ZIP Code from the input address and geocodes the address to the geographical center of ZIP Code boundary. ZIP5 matching is the least accurate means of geocoding an address and is therefore not a recommended match strategy for regulatory grade geocoding .

When all other geocode match options fail, ZIP5 matching can be used to geocode an address to the center point of a the five digit ZIP Code. For example Malden, MA 02148-7601.

mmwStat Code: 14

Centroid Code: 5

Accuracy: Approximately 30%

Geocoding Methodology Centroid Field - Code Descriptions

Status Code Description

F Initialization failed

4 ZIP +4 Match

2 Zip +2 Match

5 ZIP Match

A 99% of the ZIP Code is within a single Census Tract

B 95% of the ZIP Code is within a single Census Tract

C 90% of the ZIP Code is with in a single Census Tract

CRA Wiz Geocoding vs. FFIEC Geocoding

The biggest difference between geocoding in CRA Wiz and the FFIEC website is that the FFIEC provides only parcel, street and manual geocoding

CRA Wiz provides users with additional match strategies to increase an institution’s hit rate when batch geocoding their file (Tract matches and ZIP %, ZIP4, ZIP2 & ZIP5 centroiding)

CRA Wiz provides users with a set of suggested geocoding settings that will allow users to utilize supplemental match strategies while still ensuring the highest possible accuracy rates

While CRA Wiz provides suggested geocoding settings, it also offers institutions the flexibility to select their own geocoding settings based on their accuracy/risk tolerance.

Similar to the FFIEC geocoder, CRA Wiz allows users to manually geocode a record using a street map. CRA Wiz users also have the ability to interactively geocode an address by selecting the desired state, city and street combination to select a specific street segment to geocode a record to.