Are depression contours identified in 3D Elevation Program (3DEP) contour products?

Yes, depression contours are identified with tick marks, but only in large scale contours from 36K to 18K.

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At what scales are contours visible in The National Map Viewer?

The 500-foot contours are shown at a scale of 578K in base maps, while 100-foot contours are visible at 289K/144K and 50-foot contours are visible at 72K. Large scale contours from US Topo products are shown from 36K to 18K, and in dynamic base map services for scales larger than 18K.

What are the projection, horizontal and vertical datum, format, and distributed tile extent of 3D Elevation Program (3DEP) contours?

Contours are not projected, but are provided in geographic coordinates (latitude and longitude) in units of decimal degrees, and horizontally referenced to the North American Datum of 1983. Contour elevation values are vertically referenced to the North American Vertical Datum of 1988. Contours are staged in Esri File Geodatabase 10.1 or Shapefile...
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Date published: October 30, 2018

USGS Topo Base Map Refreshed and Other Updates

The “USGS Topo Base Map” service named “USGS Topo” has been refreshed with new data and design changes. In addition, several of the “Data Availability”, or “Data Index” services have new cloud hosted URLs.

Date published: August 8, 2018

New Elevation Map Service Available From the USGS 3D Elevation Program

The USGS 3D Elevation Program (3DEP) announces the availability of a new dynamic map service.

Date published: January 24, 2017

Maps Made with Light Show the Way

The topic, officially, was water. But during a scientific conference in Butte, Montana, in 2013, earthquake expert Michael Stickney glimpsed something unexpected in a three-dimensional lidar image of the Bitterroot Valley in nearby Missoula.

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Automated GNIS Summit Core Generation
July 26, 2018

Automated GNIS Summit Core Generation

A few summit cores delineated by the National Terrain Mapping program in the Blue Ridge province, North Carolina. While many summits are mapped via the Geographic Names Information System points, boundaries for these features don't exist. This program is automating procedures to do so for the whole nation.

May 11, 2018

New 3D Model of the Drained Crater at Pu‘u ‘Ō‘ō

During an overflight on May 11, we collected thermal images of the crater at Pu‘u ‘Ō‘ō and created an updated 3D model of the crater geometry. The collapse on April 30 produced a large cavity, with the deepest point roughly 350 m (1150 feet) below the crater rim.

The Bumble Bee, Arizona US Topo map
April 19, 2016

The Bumble Bee, Arizona US Topo map

The Bumble Bee, Arizona US Topo map, showing the Black Canyon Trail in Arizona (dotted line, near center of the map, left of Crown King Road).  USGS US Topo maps

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video thumbnail: Elevation
April 30, 2012

Elevation

The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the USGS National 3D Elevation Program (3DEP). The NED provides seamless raster elevation data of the conterminous United States, Alaska, Hawaii, and the island territories. The NED is derived from diverse source data sets that are processed to a specification with a