Confluence Retirement

Due to the feedback from stakeholders and our commitment to not adversely impact USGS science activities that Confluence supports, we are extending the migration deadline to January 2023.

In an effort to consolidate USGS hosted Wikis, myUSGS’ Confluence service is targeted for retirement. The official USGS Wiki and collaboration space is now SharePoint. Please migrate existing spaces and content to the SharePoint platform and remove it from Confluence at your earliest convenience. If you need any additional information or have any concerns about this change, please contact Thank you for your prompt attention to this matter.
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Comment: Updating definitions


titlePost Office

Message Box
titleThe Guidelines define Post Office as follows:

An official facility of the U.S. Postal Service used for processing and distributing mail and other postal material.

  • INDICATORS: Official logo of U.S. Post Office.

INCLUDES: USPS official post offices, post office stations, branch post offices, community post offices (CPOs), village post offices (VPOs), Post Office Express (POE) locations, postal annexes with a public post office, remotely managed post offices (RMPOs), and part time post offices (PTPOs)).

DOES NOT INCLUDE: Mail drop off locations (blue US Mail box), carrier annexes with no public hours, or contract postal units (CPUs, which are often in commercial establishments) that do not have their own zip code.

What is a Post Office? 
The United States Postal Service (USPS) is a branch of the federal government that sells postage and delivers mail to the general public. Only official USPS facilities that are staffed with postal service employees and have window service hours for the public should be collected.

Where can I find authoritative lists of Post Offices?’s Find Locations tool is the primary authoritative source for post offices. To limit this list to approved USPS facilities, go to’s Find Locations tool, select “Post Offices and Approved Postal Providers” from the Location Types list, click on the Refine search link, and then make sure that only “Post Offices” and “Village Post Offices” are checked.

This restricted definition ensures that the locations that only sell stamps, only have automated postal centers, or only participate in the PO Box Online program (e.g., markets, banks, and office and mailing supply stores) are omitted since they do not qualify as post offices for the National Structures dataset.

Another helpful source is USPS’s Postmaster Finder. If a point is not listed in, it may be listed as an RMPO or PTPO on the Postmaster Finder website. This tool is also helpful when searching for discontinued post offices. Be aware that this information is not regularly updated and not all post offices are listed.

Editing/Reviewing Post Offices for a city or county
If you're interested in reviewing all of the post offices for a city or county, go to the USPS Find Locations web page, restrict the search to “Post Offices” and “Village Post Offices,” type in the city of interest, and select a reasonable search radius. Then go through all of the locations and make sure they are represented in The National Map Corps’ editor. If you are working on a county, then successively type in the names of various cities in that county with a reasonable search radius for each so that when each of your search results are combined you get complete results for the whole county. NOTE: there is a USPS web page for searching for post offices within a county, but this search uses an out-of-date database, so it is recommended not to rely on this county search.

Where do I place a Post Office Structure Point?
Post offices typically occupy one small building. Larger annexes or distribution centers with public post offices may be in larger buildings. The general rule is to locate the post office structure point at the center of the building.

For more information on how to identify a post office, check out the “Aerial Photo Interpretation Part 2: Post Offices” article in our November 2017 Newsletter.

Naming Post Offices:  
The preferred way to name a post office is: <Name> + “Post Office” where <Name> is the title listed on the USPS website (e.g., “Pueblo Post Office”). Occasionally, you will see a post office on the USPS website that has a name like “Westminster (Harris Park)”; in this case, name the post office as: "Westminster Post Office Harris Park Station”.

Check out our Name and Address Formatting Guide for more on naming post offices. We also have some Q&A entries that provide more information on how to properly name Community Post Offices (CPOs), Remotely Managed Post Offices (RMPOs), Part Time Post Offices (PTPOs), and Post Office Express locations (POEs).


titleCity Hall / Town Hall

Message Box
titleThe Guidelines define a City Hall / Town Hall as follows:

A building or building complex that serves as the primary location for a local or municipal government's administrative functions.

INCLUDES: City Halls, Town Halls, Village Halls, Municipal Buildings, Municipal Centers, and City Buildings.

DOES NOT INCLUDE: County, state, or federal level administration buildings, ; historical buildings that are no longer used for government administration.

What is a City Hall / Town Hall? 

A City Hall or / Town Hall is the primary administrative building of a township or municipal government.  This may include buildings called City Hall, Town Hall, Village Hall, Municipal Building, Municipal Center, City Building or other name variations. City and Town and town halls are usually associated with Incorporated Places incorporated places in the U.S.  Incorporated places are a legally defined entity and may be called city, borough, town, or village (depends depending on the state). There are over 19,000 incorporated places in the U.S. as per the Census Bureau's Boundary and Annexation Survey (BAS). There are no incorporated places in Hawaii or Puerto Rico.
Characteristics of a City Hall / Town Hall may include the building being open to the public, the city or town mayor and council operating out of that building
City and town halls mainly house the mayor and the city/town council, as well as assorted departments and employees of local governments.  local government departments often including, but not limited to: the municipal court, the city clerk, the city manager, or the local police department (in smaller towns). Please note that this feature class does not include county, state, or federal level administration buildings.

Where can I find authoritative lists of City Hall / Town Hall structures?
There are no authoritative lists of City Hall / Town Hall structures.  The The best way to confirm a City Hall / Town Hall feature point structure is to research the official website of the city, village, or township.  

The closest thing to a national list may be a list of cities and townships on, however these only include a small portion of the country’s cities and townships.  When When using lists like these, it is important that users to verify each City Hall / Town Hall with an authoritative source.
Where do I place a City Hall / Town Hall structure point?
Most municipalities or townships have one central building.  If this is the case, place the point at the center of the
Sometimes a state government website or a search for a list of city halls for a specific state will yield a list of municipalities to review for city and town hall locations. Some states have municipal league organizations which may be informative. Many states now have on-line maps which may offer municipal locations.

Check out our Authoritative Sources List for more on the types of sources that are acceptable.

Where do I place a City / Town Hall structure point?

Most municipalities or townships have one central city or town hall building. If this is the case, place the point at the center of the building.

Some municipalities may have a municipal “campus” of buildings with administrative offices; others may have individual buildings that are geographically distributed throughout the city.  It It is important to note that we are not collecting the location of individual city departments.  We We are only collecting the primary city/town hall ; (i.e., typically the building that houses the city council and/or mayor’s office). Place the point at the center of this buildingthis building.

Multiple incorporated places may share a building for their government functions. If so, add a point for each city/town hall. An example of this is the Rye Town Office which occupies space on the Third Floor of the Port Chester Village Hall in Port Chester, NY.

For more information on how to identify a City / Town Hall, check out the “Aerial Photo Interpretation Part 8: City/Town Halls” article in our November 2018 Newsletter.

How do I name a City


/ Town Hall?

Similar to courthouses, try to determine the name of the building when editing City Hall / Town Hall structures.  Contact Common terminology for building names may include City Hall, Town Hall, Village Hall, Municipal Building, Municipal Center, and City Building among others. Contact information on government websites usually includes the building name with the address.  Examples Examples include Denver’s City Council located in the City and County Buildingwhich houses Denver’s city council, or Cedar Rapids’s Manager’s Office in the Rapids’ City Hall:Cedar Rapids's Manager's Office in City HallImage Removed Denver's City Council in the City and County BuildingImage Removed which houses the city manager: Image Added Image AddedOur Name and Address Formatting Guide has a few additional examples of how to properly format a name for this structure type