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 new 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 code 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 Dover: 618319

GNIS ID for Norfolk County: 606937

GNIS ID for Massachusetts: 606926

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 Dover:

Place (Community) Code:	17370
State Code:	25 (Massachusetts)
County Code:	021 (Norfolk 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:	25/17370
State/County Code:	25/021

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 Massachusetts:	25		606926
Norfolk County:	25/021		606937
Dover:	25/17370		618319

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 Dover, it is a point within Dover 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 Dover, the GNIS GPS location is given as:

Lat:   42° 14' 45"   (or 42.25°)

Lon:   -71° 16' 58"   (or -71.28°)  

Determined by its statistical needs, the Census Bureau has defined a sampling area for Dover - 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 Dover, the Census 2010 GPS location is given as:

Lat:   42° 14' 6"   (or 42.24°)

Lon:   -71° 17' 16"   (or -71.29°)  

The map point defined by the Census Bureau lies 4,143 feet to the south<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:   42° 14' 19"   (or 42.24°)

Lon:   -71° 16' 56"   (or -71.28°)  

The GPS location given for the 2000 Census lies 2,015 feet to the northeast<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. Dover is located in Region #1 (the Northeast Region).

In turn, the US Census Bureau has further divided each Region into Divisions. Dover is located in Division #1 (the New England Division).

The Office of Management and Budget (OMB) has created ten Federal Regions. Dover is located in Region I (Region 1).

The Federal Emergency Management Agency (FEMA) has created ten Management Regions. Dover is located in Region I (Region 1).

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 community like Dover, it does identify addresses that are in (or near) Dover. 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 Dover: 02030<3>

Referenced GNIS Records ...

GNIS ID #611917   (Name of Record: Dover)

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: Norfolk

Map Name: Medfield

Lat: 42.2459311       Lon: -71.2828342  

Elev: 52 ft.

GNIS ID #618319   (Name of Record: Town of Dover)

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: Norfolk

Map Name: Medfield

Lat: 42.2334311       Lon: -71.282834  

Elev: 66 ft.

Referenced FIPS Records ...

FIPS Code: 25/17370   (Place Name: Dover (census name for Dover Center))

County: Norfolk     (FIPS State/County: 25/021)

Class: U1

GSA Code: 253

MRF Code: 975

MSA Code: 1120

FIPS Code: 25/17405   (Place Name: Dover (Town of))

County: Norfolk     (FIPS State/County: 25/021)

Class: T1

MSA Code: 1120

Off-the-Road Links ...

The official website for Dover: www.doverma.org/

The official website for Norfolk County: www.norfolkcounty.org/

The official website for State of Massachusetts: https://www.mass.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)