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The National Map Viewer

November 3, 2022

Use The National Map Viewer to explore base-layer GIS data, see availability of USGS topographic maps, and create your own web map.

The National Map Viewer web application
Viewer application for The National Map 

The National Map is a collection of free, nationally-consistent geographic datasets that describe the landscape of the United States and its territories.

Included in The National Map are the latest elevation data from the 3D Elevation Program (3DEP), surface water data from the National Hydrography Datasets (NHD), and place name data from the Geographic Names Information System (GNIS). In addition, The National Map provides continuously-updated, seamless datasets for recreational trails, roads, boundaries, structures, land cover, and imagery.

The National Map also serves as the data source for modern USGS topographic maps such as US Topos and OnDemand Topos. US Topo maps and scans of historic USGS topographic maps are also available as a part of The National Map.   

Data and products from The National Map can be used by government, industry, academia, as well as the public, in support of geologic mapping, natural hazard planning, natural resource conservation, emergency management, recreation, and many, many other applications.

The National Map is managed by the USGS’ National Geospatial Program in coordination with federal, state, and local partners and may be accessed through data download, web map services, and an online viewer. 


TNM Data Availability Views


US Topo Availability

Screen capture of US Topo Availability Service in The National Map Viewer
Click to view US Topo Availability Service

The US Topo Availability Service shows publication year of the National Geospatial Program's US Topo maps. Explore the service in The National Map Viewer. Learn more about US Topo: Maps for America.


3DEP Lidar Availability

Screen shot of the Lidar Availability Viewer
Click to visit the 3DEP Lidar Availability Viewer. 

The 3DEP Lidar Availability Application is an interactive map showing 3DEP lidar availability by quality level.

Elevation Index: Source Data Index - Lidar, Ifsar, DEM

More information on Lidar Quality Level




3DEP 1-meter DEM Availability

Screen shot of the 3DEP DEM Availability Application
Click to visit the 3DEP 1-meter DEM Availability Viewer. 

A dynamic map showing 3DEP 1-meter DEM availability for the United States and its Territories. This map is created using services from The National Map.