Miscellaneous Information

Various Identification Codes ...

GNIS Codes ...

The U.S. Board on Geographic Names (BGN) was created to address the problems caused by spelling and naming variations. The BGN will usually recognize an existing name or, when necessary, establish a name for a geographic feature (such as a mountain, lake, river, stream, city, town, village, dam, bridge, etc).

The BGN names are kept in a database called the Geographic Names Information System (GNIS) and it is the official Federal repository. The GNIS is operated and maintained by the U.S. Geological Survey (USGS).

A unique and permanent identification number has been assigned for each name in the GNIS database. These names and identifiers are definitive and it is intended that they are to be used by all departments of the Federal Government:

GNIS ID for Chatham: 2397606

GNIS ID for Sangamon County: 1785010

GNIS ID for Illinois: 1779784

FIPS Codes ...

In a past effort, various federal agencies worked together to create a set of codes with a purpose similar to the GNIS codes. These codes are called the Federal Information Processing Standard (or the FIPS 55 codes). Although they are still used by some organizations, the FIPS codes are obsolete and will ultimately be replaced by the GNIS codes.

The following FIPS codes apply to Chatham:

Place (Community) Code:	12684
State Code:	17 (Illinois)
County Code:	167 (Sangamon County)

Since the Place and County FIPS codes are not unique and can be repeated in other States, it's necessary to combine the State code with the Place and County FIPS codes to uniquely identify them - for example:

State/Place Code:	17/12684
State/County Code:	17/167

As already mentioned, the FIPS codes are to be replaced by the GNIS codes. The following reflect those changes:

	FIPS Code	translates to	GNIS Code
State of Illinois:	17		1779784
Sangamon County:	17/167		1785010
Chatham:	17/12684		2397606

GPS Location - GNIS vs Census ...

An important aspect of the GNIS code is that it assigns a GPS location (the latitude/longitude) to the geographic feature. This location is simply a point on the map and does not represent the size or shape of the feature. In the case of Chatham, it is a point within Chatham that might be a post office, the city hall or simply an intersection - the point should really be considered arbitrary and only indicating a general location.

For Chatham, the GNIS GPS location is given as:

Lat:   39° 40' 17"   (or 39.67°)

Lon:   -89° 41' 48"   (or -89.7°)  

Determined by its statistical needs, the Census Bureau has defined a sampling area for Chatham - this area also contains a map point. As with the GNIS code, the location of the Census point should be considered as being arbitrary within the sampling area.

For Chatham, the Census 2010 GPS location is given as:

Lat:   39° 40' 14"   (or 39.67°)

Lon:   -89° 41' 58"   (or -89.7°)  

The map point defined by the Census Bureau lies 822 feet to the west<1> of the point given by the GNIS (see above).

You might note that the GPS location given for the 2010 Census is different than the location that was specified by the 2000 Census:

Lat:   39° 40' 22"   (or 39.67°)

Lon:   -89° 41' 54"   (or -89.7°)  

The GPS location given for the 2000 Census lies 835 feet to the north<2> of the point given by the 2010 Census.

Regional Codes ...

For statistical purposes, the US Census Bureau has divided the country into four Regions. Chatham is located in Region #2 (the Midwest Region).

In turn, the US Census Bureau has further divided each Region into Divisions. Chatham is located in Division #3 (the East North-Central Division).

The Office of Management and Budget (OMB) has created ten Federal Regions. Chatham is located in Region V (Region 5).

The Federal Emergency Management Agency (FEMA) has created ten Management Regions. Chatham is located in Region V (Region 5).

ZIP Codes ...

While some people have used a ZIP code to identify a community, the purpose of the ZIP code was to make mail delivery more efficient by grouping addresses together. Although the ZIP Code doesn't specifically identify a village like Chatham, it does identify addresses that are in (or near) Chatham. It's important to remember that the boundaries of a ZIP Code are defined by the needs of the USPS and can be changed, re-assigned or overlapped with other ZIP Codes.

The ZIP code for Chatham: 62629<3>

Referenced GNIS Records ...

GNIS ID #405992   (Name of Record: Chatham)

Class: populated place

A place or area having clustered or scattered buildings and a permanent population (such as a city, settlement, town or village). The boundaries may or may not coincide with the perceived population.

A 'populated place' record may have a corresponding 'census' or 'civil' record. The information contained in the 'populated place' record applies only to the class and should not be confused with either the 'census' and 'civil' classes.

County: Sangamon

Map Name: Chatham

Lat: 39.676163       Lon: -89.7045439  

Elev: 184 ft.

GNIS ID #2397606   (Name of Record: Village of Chatham)

Class: civil

A political division formed for administrative purposes (such as a borough, county, incorporated place, parish, town or township).

A 'civil' record may have a corresponding 'census' or 'populated place' record. The information contained in the 'civil' record applies only to the class and should not be confused with either the 'census' and 'populated place' classes.

County: Sangamon

Map Name: Chatham

Lat: 39.6714154       Lon: -89.69672  

Elev: 182 ft.

Referenced FIPS Records ...

FIPS Code: 17/12684   (Place Name: Chatham)

County: Sangamon     (FIPS State/County: 17/167)

Class: C1

Identifies an incorporated place (ie- Chatham) that does not serve as a primary county division - or in other words, it is included in and is part of a primary county division (ie- Sangamon County).

GSA Code: 1600

MRF Code: 1015

MSA Code: 7880

Off-the-Road Links ...

The official website for Chatham: www.chathamil.net/

The official website for Sangamon County: www.co.sangamon.il.us/

The official website for State of Illinois: https://illinois.gov

The official website of the U.S. Board on Geographic Names (BGN)

The official website of the U.S. Geological Survey (USGS)

The official website of the U.S. Census Bureau

The official website of the U.S. Office of Management and Budget (OMB)

The official website of the U.S. Federal Emergency Management Agency (FEMA)