USGS Imagery Topo Base Map Service from The National Map

Metadata Updated: February 8, 2018

USGS Imagery Topo is a topographic tile cache base map with orthoimagery as a backdrop, and combines the most current data (Boundaries, Names, Transportation, Elevation, Hydrography, and other themes) that make up The National Map. Contours generated for the US Topo product are included and are visible along with other data to the 1:18,000 zoom scale. This product is designed to provide a seamless view of the data, closely resembling The National Map's US Topo (GeoPDF) product at large scales, in a GIS accessible format. Orthoimagery data are typically high resolution aerial images that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a map. Digital orthoimage resolution may vary from 6 inches to 1 meter. In the former resolution, every pixel in an orthoimage covers a six inch square of the earth's surface, while in the latter resolution, one meter square is represented by each pixel. Blue Marble: Next Generation and Landsat imagery data sources are displayed at small to medium scales, however, the majority of the imagery service source is from the National Agriculture Imagery Program (NAIP) for the conterminous United States. The data is 1-meter pixel resolution with "leaf-on". Collection of NAIP imagery is administered by the U.S. Department of Agriculture's Farm Service Agency (FSA). In areas where NAIP data is not available other imagery may be acquired through partnerships by the USGS. The National Map Program is working on acquisition of large scale imagery for the nonconterminous States of Alaska and Hawaii. For the most part, any new Alaska orthoimagery data will not be available in this service due to license restrictions.

Access & Use Information

Downloads & Resources

Dates

Metadata Date May 16, 2017
Metadata Created Date February 8, 2018
Metadata Updated Date February 8, 2018
Reference Date(s) January 1, 2017 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from USGS Cached Base Map Services from The National Map

Graphic Preview

Browse graphic showing US representation at small scale.

Additional Metadata

Resource Type Dataset
Metadata Date May 16, 2017
Metadata Created Date February 8, 2018
Metadata Updated Date February 8, 2018
Reference Date(s) January 1, 2017 (publication)
Responsible Party U.S. Geological Survey, National Geospatial Technical Operations Center (Point of Contact)
Contact Email
Access Constraints Use Constraints: None. Acknowledgement of the originating agencies would be appreciated in products derived from these data., Access Constraints: None
Bbox East Long 180
Bbox North Lat 71.5
Bbox South Lat 17.625
Bbox West Long -179.1666667
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Browse graphic showing US representation at small scale.
Graphic Preview File https://thor-f5.er.usgs.gov/ngtoc/metadata/waf/services/base_maps/browse/basemap-imagery-topo.png
Graphic Preview Type PNG
Guid
Harvest Object Id dd0fd553-4e37-4dcc-a24e-b64a0b550ace
Harvest Source Id c361474f-cff4-48e6-a21a-c2017bfea84b
Harvest Source Title USGS Cached Base Map Services from The National Map
Licence Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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