National Geospatial Technical Operations Center

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The U.S. Geological Survey National Geospatial Technical Operations Center (NGTOC) provides leadership and world-class technical expertise in the acquisition and management of trusted geospatial data, services, and map products for the Nation. NGTOC supports The National Map as part of the National Geospatial Program (NGP). 

The National Map

The National Map

The National Map is a collaborative effort among the USGS and partners to improve and deliver topographic information for the Nation. The NGTOC creates, maintains and publishes the products and services of The National Map.

Products & Services

Center of Excellence for Geospatial Information Science (CEGIS)

Center of Excellence for Geospatial Information Science (CEGIS)

CEGIS is a virtual organization with Federal and academic affiliate scientists conducting research in support of The National Map and the Three-Dimensional Elevation Program (3DEP).

CEGIS Information

News

Date published: February 26, 2020

Mapping Challenge Update (02/26/2020): City / Town Hall Structures in MT, ND, & SD

This challeng is SO CLOSE to being finished! 

Approximately 80 edits came in since last week, leaving less than 20 existing points to be reviewed.  Don't forget to check for missing city/town halls, too.  

Date published: February 26, 2020

Mapping Challenge Update (02/26/2020): Schools in AR

Over 100 edits came in since last week - nice work!  Volunteers are also correcting duplicates, closed schools, and PreK/childcare facilities - thank you! Don't forget to check for missing schools, too.  

Date published: February 26, 2020

Mapping Challenge Update (02/26/2020): City / Town Hall Structures in AR

This challenge is coming along nicely with almost 30 points added since last week!

Publications

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Year Published: 2019

Analysis for agreement of the Northern Gulf of Mexico topobathymetric digital elevation model with 3-Dimensional Elevation Program 1/3 arc-second digital elevation models

Topographical differencing and edge-matching analyses were used to evaluate agreement of the Coastal National Elevation Database Applications Project’s Northern Gulf of Mexico topobathymetric digital elevation model (TBDEM) with The National Map 3-Dimensional Elevation Program (3DEP) 1/3 arc-second digital elevation models (DEMs). In addition to...

Miller-Corbett, Cynthia
Miller-Corbett, C., 2019, Analysis for agreement of the Northern Gulf of Mexico topobathymetric digital elevation model with 3-Dimensional Elevation Program 1/3 arc-second digital elevation models: U.S. Geological Survey Open-File Report 2019–1016, 44 p., https://doi.org/10.3133/ofr20191016.

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Year Published: 2019

Topographic mapping evolution: From field and photogrammetric data collection to GIS production and Linked Open Data

Whither the topographic map? Topographic mapping historically has been approached as a map factory operation through the period 1879-1990. During this time, data were field and photogrammetrically collected; cartographically verified and annotated creating a compilation manuscript; further edited, generalized, symbolized, and produced as a graphic...

Usery, E. Lynn; Varanka, Dalia E.; Davis, Larry

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Year Published: 2018

A comparison of synthetic flowpaths derived from light detection and ranging topobathymetric data and National Hydrography Dataset High Resolution Flowlines

Bathymetric and topobathymetric light detection and ranging (lidar) digital elevation models created for the Delaware River were provided to the National Geospatial Program and used to evaluate synthetic flowpath extraction from bathymetric/topobathymetric lidar survey data as a data source for improving the density, distribution, and connectivity...

Miller-Corbett, Cynthia
Miller-Corbett, C., 2018, A comparison of synthetic flowpaths derived from light detection and ranging topobathymetric data and National Hydrography Dataset high resolution flowlines: U.S. Geological Survey Open-File Report 2018–1058, 29 p., https://doi.org/10.3133/ofr20181058.