National Geospatial Technical Operations Center

Home

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: November 12, 2019

Mapping Challenge Results: Cemeteries in Calhoun, Jackson, and Kalamazoo Counties, MI

This challenge is now complete!!  Thank you to everyone who contributed!  Here is a time lapse of our volunteer contributions for this challenge:

Date published: November 12, 2019

Celebrating 10 years

The National Geospatial Technical Operations Centers in Rolla, Missouri and Lakewood, Colorado are celebrating the 10th Anniversary of their current organizational structure on November 13, 2019. 

Date published: November 7, 2019

Mapping Challenge Update (11/07/19): City / Town Hall Structures in OH and WV

Here is the weekly update for this challenge!

Publications

Publication Thumbnail
Year Published: 2019

Problems of Large Spatial Databases

Large spatial databases often labeled as geospatial big data exceed the capacity of commonly used computing systems as a result of data volume, variety, velocity, and veracity. Additional problems also labeled with V’s are cited, but the four primary ones are the most problematic and focus of this chapter (Li et al., 2016, Panimalar et al., 2017...

Usery, E. Lynn

Publication Thumbnail
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.

Publication Thumbnail
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