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

The National Map - Data Delivery

The National Map - Data Delivery

This site provides applications and web map services for "Topographic Information for the Nation". This information includes topographic maps and geographic information system (GIS) data

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The National Map Training Videos

The National Map Training Videos

The National Geospatial Program has released a series of “how to” videos for people who are working with The National Map data and services.  The videos show how to use the services and interfaces to access data and tools.

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News

Date published: September 28, 2020

TNMCorps Newsletter – September 2020

The National Map Corps September 2020 Newsletter (Vol. 6, Issue 5) is now available.

Date published: September 24, 2020

Mapping Challenge Update (09/24/2020): Schools in OH, MI, & IN

Volunteers contributed almost 800 edits in the last week - EXCEPTIONAL!! This includes approximately 200 points that were removed due to either the school being closed or the wrong feature type. Thank you for helping to update The National Map!

Date published: September 24, 2020

FINISHED! City / Town Halls in MA, CT, & RI

This challenge is now complete! Thank you to everyone who contributed!

Publications

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Year Published: 2020

Elevation-derived hydrography acquisition specifications

Hydrographic features derived from U.S. Geological Survey (USGS) 3D Elevation Program data, and collected for use by the USGS, must meet the specifications described in this document. The specifications described herein pertain to the final product delivered to the USGS, not to methods used to derive the hydrographic features. The specifications...

Terziotti, Silvia; Archuleta, Christy-Ann
Terziotti, S., and Archuleta, C.M., 2020, Elevation-Derived Hydrography Acquisition Specifications: U.S. Geological Survey Techniques and Methods, book 11, chap. B11, 74 p., https://doi.org/10.3133/tm11B11.

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Year Published: 2020

Elevation-derived hydrography—Representation, extraction, attribution, and delineation rules

With the increasing availability of 3D Elevation Program (3DEP) quality high resolution elevation data across the United States and the pressing need for better integrated elevation and hydrography data, the U.S. Geological Survey is developing guidance to improve the horizontal and vertical alignment of these datasets. The U.S. Geological Survey...

Archuleta, Christy-Ann; Terziotti, Silvia
Archuleta, C.M., and Terziotti, S., 2020, Elevation-Derived Hydrography—Representation, Extraction, Attribution, and Delineation Rules: U.S. Geological Survey Techniques and Methods, book 11, chap. B12, 60 p., https://doi.org/ 10.3133/ tm11B12.

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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.