An anti-vehicle barricade has been constructed across this section of the international boundary. Grass cover has increased in the foreground, providing evidence of the site’s grassland connection. (Raymond M. Turner)
Why don’t the boundaries on US Topo maps match and why are some missing?
Improving boundaries for USGS topographic maps is an ongoing effort. Boundaries have been added to computer-generated US Topo maps (published 2009-present) as digital versions become available:
-
2009-2010 – The U.S. national boundary was the only boundary shown.
-
2011 – State and county boundaries added using TIGER/Line data from the U.S. Census Bureau.
-
2011 – U.S. Forest Service areas added.
-
2013 – National Park Service lands, Fish and Wildlife Service lands, and military reservations added.
-
2013 – Bureau of Land Management boundaries added ONLY to US Topos in Alaska.
-
2015-2016 – National Cemetery Administration boundaries added.
Unlike hand-drawn Historical USGS Topographic Maps (published 1884-2006), boundaries on computer-generated US Topo and OnDemand Topo maps don't always align perfectly when boundary lines from several sources are combined. Where boundaries differ significantly between agencies, those agencies will collaborate to reconcile them.
USGS topographic maps are general reference publications and can’t be used as legally authoritative sources for boundary information or litigation.
Related Content
How can I submit a question or report issues regarding The National Map products and services?
Submit questions about The National Map products or report issues to The National Map service desk at: tnm_help@usgs.gov
What download formats are available for boundaries, structures, and transportation data products in The National Map?
Boundaries, structures, and transportation data products are currently available in Esri File Geodatabase 10.1 or Shapefile format. Use The National Map Downloader , The National Map Services , or download files staged at the below sites. USGS National Boundary Dataset USGS National Structures Dataset USGS National Transportation Dataset
How do I find, download, or order topographic maps?
The U.S. Geological Survey (USGS) has been the primary civilian mapping agency of the United States since 1879. Some of the most well-known USGS maps are the 1:24,000-scale topographic maps, also called 7.5-minute quadrangles . In 2009, the USGS transitioned from our hand scribed historical topographic maps to US Topos , which are computer-generated on a regular schedule using national databases...
I found an error on a map. How can I report it and when will you fix it?
There are different answers to this question for different products. In all cases, we must know what product you're addressing. Please read the following guidelines and email error reports to tnm_help@usgs.gov : US Topo Maps (topographic maps published 2009-present) Please include the following information: The map title, state, and date (from the title block in the lower right corner)...
Are US Topo products available for Alaska?
Yes, US Topo products are available for all of Alaska. Publication of 1:25,000-scale US Topo maps in Alaska began in 2013. The production schedule is determined by availability of IFSAR elevation data and SPOT imagery provided by the Alaska Statewide Digital Mapping Initiative . To see an index map of publication dates for US Topos in Alaska, go to the National Map Downloader . Put a checkmark...
How accurate are US Topo maps, and why don't they have an accuracy statement?
US Topo maps are as accurate as the data sources used to make them, but because these sources are many and varied, it is not possible to make a single simple statement that the map as a whole meets a particular level of accuracy. US Topo maps, therefore, do not have a traditional accuracy statement in the map collar. Accuracy information for individual data sources is included in the metadata file...
How can I find the source and vintage of each US Topo data layer?
US Topo maps have a credit legend in the lower left-hand corner of the map collar. This includes a short summary of data sources and data currency. More detailed source information is in an XML metadata file attached to each GeoPDF file. This file contains series-level, quad-level, and layer-level metadata, but US Topo does not preserve or track feature-level metadata. Open the GeoPDF map file in...
Why are there no power lines, pipelines, libraries, trails, etc. on US Topo maps?
The original USGS 7.5-minute (1:24,000 scale) Historical Topographic Maps (produced 1945-1992) included feature classes that are not yet shown on US Topo maps (produced 2009-present). Examples include pipelines, power lines, survey markers, many types of boundaries, and many types of buildings. The USGS no longer does field verification or other primary data collection for these feature classes...
Boundary Monument 75E, Southeastern Arizona - 2009
An anti-vehicle barricade has been constructed across this section of the international boundary. Grass cover has increased in the foreground, providing evidence of the site’s grassland connection. (Raymond M. Turner)
Boundary Monument 75E, Southeastern Arizona - 1994
During the past century, the grassland has continued to become more shrubby with increases in such plants as broom snakeweed and velvet mesquite. The mesquite, occurring here near the upper limits of its range, has remained short, probably as the result of catastrophic freezes that have visited the area. Bush muhly is found beneath some of the mesquites.
During the past century, the grassland has continued to become more shrubby with increases in such plants as broom snakeweed and velvet mesquite. The mesquite, occurring here near the upper limits of its range, has remained short, probably as the result of catastrophic freezes that have visited the area. Bush muhly is found beneath some of the mesquites.
Boundary Monument 75E, Southeastern Arizona - 1893
Related Content
How can I submit a question or report issues regarding The National Map products and services?
Submit questions about The National Map products or report issues to The National Map service desk at: tnm_help@usgs.gov
What download formats are available for boundaries, structures, and transportation data products in The National Map?
Boundaries, structures, and transportation data products are currently available in Esri File Geodatabase 10.1 or Shapefile format. Use The National Map Downloader , The National Map Services , or download files staged at the below sites. USGS National Boundary Dataset USGS National Structures Dataset USGS National Transportation Dataset
How do I find, download, or order topographic maps?
The U.S. Geological Survey (USGS) has been the primary civilian mapping agency of the United States since 1879. Some of the most well-known USGS maps are the 1:24,000-scale topographic maps, also called 7.5-minute quadrangles . In 2009, the USGS transitioned from our hand scribed historical topographic maps to US Topos , which are computer-generated on a regular schedule using national databases...
I found an error on a map. How can I report it and when will you fix it?
There are different answers to this question for different products. In all cases, we must know what product you're addressing. Please read the following guidelines and email error reports to tnm_help@usgs.gov : US Topo Maps (topographic maps published 2009-present) Please include the following information: The map title, state, and date (from the title block in the lower right corner)...
Are US Topo products available for Alaska?
Yes, US Topo products are available for all of Alaska. Publication of 1:25,000-scale US Topo maps in Alaska began in 2013. The production schedule is determined by availability of IFSAR elevation data and SPOT imagery provided by the Alaska Statewide Digital Mapping Initiative . To see an index map of publication dates for US Topos in Alaska, go to the National Map Downloader . Put a checkmark...
How accurate are US Topo maps, and why don't they have an accuracy statement?
US Topo maps are as accurate as the data sources used to make them, but because these sources are many and varied, it is not possible to make a single simple statement that the map as a whole meets a particular level of accuracy. US Topo maps, therefore, do not have a traditional accuracy statement in the map collar. Accuracy information for individual data sources is included in the metadata file...
How can I find the source and vintage of each US Topo data layer?
US Topo maps have a credit legend in the lower left-hand corner of the map collar. This includes a short summary of data sources and data currency. More detailed source information is in an XML metadata file attached to each GeoPDF file. This file contains series-level, quad-level, and layer-level metadata, but US Topo does not preserve or track feature-level metadata. Open the GeoPDF map file in...
Why are there no power lines, pipelines, libraries, trails, etc. on US Topo maps?
The original USGS 7.5-minute (1:24,000 scale) Historical Topographic Maps (produced 1945-1992) included feature classes that are not yet shown on US Topo maps (produced 2009-present). Examples include pipelines, power lines, survey markers, many types of boundaries, and many types of buildings. The USGS no longer does field verification or other primary data collection for these feature classes...
Boundary Monument 75E, Southeastern Arizona - 2009
An anti-vehicle barricade has been constructed across this section of the international boundary. Grass cover has increased in the foreground, providing evidence of the site’s grassland connection. (Raymond M. Turner)
An anti-vehicle barricade has been constructed across this section of the international boundary. Grass cover has increased in the foreground, providing evidence of the site’s grassland connection. (Raymond M. Turner)
Boundary Monument 75E, Southeastern Arizona - 1994
During the past century, the grassland has continued to become more shrubby with increases in such plants as broom snakeweed and velvet mesquite. The mesquite, occurring here near the upper limits of its range, has remained short, probably as the result of catastrophic freezes that have visited the area. Bush muhly is found beneath some of the mesquites.
During the past century, the grassland has continued to become more shrubby with increases in such plants as broom snakeweed and velvet mesquite. The mesquite, occurring here near the upper limits of its range, has remained short, probably as the result of catastrophic freezes that have visited the area. Bush muhly is found beneath some of the mesquites.
Boundary Monument 75E, Southeastern Arizona - 1893