TIGERZIP 2007

Introduction

The TIGER/ZIP File is created by matching the information on the Census Bureau's TIGER File to the United States Postal Service's ZIP+4 Product. The resulting file contains over 33 million data records from more than 27,000 5-digit ZIP Codes. The records relate ZIP Codes to state, county, Standard Metropolitan Statistical Areas (SMSA) codes, tract number, block number, and geographic coordinate information. Coverage of the file is limited to the address ranges in ZIP+4 Product that could be successfully matched to the address ranges in the Census Bureau's TIGER File. The file also includes data collected by the USPS using Global Positioning System (GPS) technology. 

File Descriptions

TIGER.DAT File

The TIGER.DAT file is used to match the state code assigned by the Census Bureau to correct the state abbreviation. It also matches the county code to its corresponding county name. The State Code and County Code fields can be found in the data records.

Table 1. TIGERDAT File Record Layout

Table 2. Copyright Record Layout

 Table 3. Data Records

Data Element Definitions

ZIP+4 Code

ZIP: A 5-digit code that identifies a specific geographic delivery area. ZIP Codes can represent an area within a state, an area that crosses state boundaries (unusual condition), or a single building or company that has a very high mail volume. "ZIP" is an acronym for Zone Improvement Plan.

+4: Describes the last four positions of a ZIP+4 Code. Most delivery addresses are assigned a single ZIP+4 Code. However, large companies may be given a range of ZIP+4 Codes that can be used to route mail to a specific department.

TLID

Tiger Line Identification (TLID) is a universal number associated with Census Bureau products.

Carrier Route

Carrier identification code or number for a given delivery route or PO box presentation.

State Code

A 2-digit code assigned by the Census Bureau.

County Code

The 3-digit Federal Information Processing Standard (FIPS) code assigned to counties and county equivalents in sequence within each state.

 RL Flag

Right-Left Flag (RL Flag) signifies the side of the street upon which the +4 code resides. (e.g., R = right, L = left, and B = both sides that are possible at times).

Census Tract Number

Small, locally delineated statistical areas within selected counties, generally having stable boundaries and, when first established by local communities, designed to have relatively homogeneous demographic characteristics.

Census Block Number

Blocks are numbered uniquely within each census tract with a 3-character number that identifies the collection block used in the census and a character block suffix. This character block suffix is often blank.

From Latitude

The north/south measurement indicating the beginning point of the address.

From Longitude

The east/west measurement indicating the beginning, point of the address.

To Latitude

A north/south measurement indicating the ending point of the address.

To Longitude

The east/west measurement indicating the ending point of the address.

Primary Metropolitan Statistical Area (PMSA)

A 4-digit code assigned to areas that comprise one or more counties, including, a major population nucleus and nearby communities that have a high degree of interaction.

Consolidated Metropolitan Statistical Area (CMSA)

A 4-digit code assigned to areas that consist of primary metropolitan statistical areas.

Multiple Match Indicator

The ZIP+4 Code matched with more than one census block/latitude/longitude is identified with a multiple match indicator, which would be "Y" if the condition occurred

Multiple matches can occur because

1. The Census Bureau reported the same block with different latitude/longitude,

2. The ZIP+4 block face was in more than one census block due to coding convention differences between the Census Bureau and the United States Postal Service, or;

3. Ambiguous data exists in either the Census TIGER/ZIP file, ZIP+4, or both.

CRLF

This field only appears in the ".TXT" files on the CD-ROM and is used to break the records.

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