This is a 3 ft resolution digital elevation model derived from light detection and ranging (lidar). Lidar was collected in 2018 and coverage includes a portion of Clarksburg, Maryland, focused around the Clarksburg Special Protection Area (CSPA).

This dataset contains a digital elevation model (DEM) covering two watersheds in Clarksburg, Montgomery County, Maryland. This DEM has been hydrologically conditioned to breach detention basins, culverts, and other potential barriers to surface flow (i.e. ‘pits’).

This is a 3 ft resolution digital elevation model derived from light detection and ranging (lidar). Lidar was collected in 2013 and coverage includes a portion of Clarksburg, Maryland, focused around the Clarksburg Special Protection Area (CSPA).

This is a 3 ft resolution digital elevation model derived from light detection and ranging (lidar). Lidar was collected in 2002 and coverage includes a portion of Clarksburg, Maryland, focused around the Clarksburg Special Protection Area (CSPA).

This is a 3 ft resolution digital elevation model derived from light detection and ranging (lidar). Lidar was collected in 2008 and coverage includes a portion of Clarksburg, Maryland, focused around the Clarksburg Special Protection Area (CSPA).

Mount Adams, also known by the Native American names "Klickitat" or "Pahto", is a 3,742 meter-tall (12,278 feet) stratovolcano located 53 km (33 miles) north of the Columbia river straddling the borders of Skamania County, Yakima County and the Yakama Nation Reservation. Mount Adams lies in the middle of the Mount Adams volcanic field—a 1,250 square kilometer area (about 480 square miles) comprising at least 120, mostly basaltic volcanoes that form spatter and scoria cones, shield volcanoes, and some extensive lava flows. The volcanic field has been active for at least the past one million years. Mount Adams was active from about 520,000 to about 1,000 years ago and has erupted mostly andesite. Eruptions have occurred from ten vents since the last period of glaciation about 15,000 years ago. The volcano has produced a larger volume (about 300 cubic kilometers or 70 cubic miles) of eruptive material during the past million years than any other Cascade stratovolcano, surpassed only by Mount Shasta (about 350 cubic kilometers or 85 cubic miles). Approximately 6,000 and 300 years ago, debris avalanches from the southwest face of Mount Adams generated clay-rich lahars that swept more than 30 square kilometers (11 square miles) south of the volcano along the White Salmon River. The summit of Mount Adams contains a large section of unstable, hydrothermally-altered rock that can spawn future debris avalanches and lahars. This DEM (digital elevation model) represents the ground surface beneath forest cover of Mount Adams and adjacent vicinity. It is the product of high-precision airborne lidar (Light Detection and Ranging) surveys conducted during August and September of 2016 by Quantum Spatial under contract with the USGS; total area is 2278.6 square kilometers (879.8 square miles). This release consists of DEM and corresponding hillshade rasters. The survey area is divided into four sections: adams_edifice.tif, adams_indian_heaven.tif, adams_west.tif, and adams_east.tif. Hillshade images are spatially coincident to the DEM from which they are derived. Filenames appended with the suffix “_hs” indicate hillshade images (e.g. adams_edifice_hs.tif).

This is a tiled collection of the 3D Elevation Program (3DEP) and is one meter resolution. The 3DEP data holdings serve as the elevation layer of The National Map, and provide foundational elevation information for earth science studies and mapping applications in the United States. Scientists and resource managers use 3DEP data for hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. The elevations in this DEM represent the topographic bare-earth surface. USGS standard one-meter DEMs are produced exclusively from high resolution light detection and ranging (lidar) source data of one-meter or higher resolution. One-meter DEM surfaces are seamless within collection projects, but, not necessarily seamless across projects. The spatial reference used for tiles of the one-meter DEM within the conterminous United States (CONUS) is Universal Transverse Mercator (UTM) in units of meters, and in conformance with the North American Datum of 1983 (NAD83). All bare earth elevation values are in meters and are referenced to the North American Vertical Datum of 1988 (NAVD88). Each tile is distributed in the UTM Zone in which it lies. If a tile crosses two UTM zones, it is delivered in both zones. The one-meter DEM is the highest resolution standard DEM offered in the 3DEP product suite. Other 3DEP products are nationally seamless DEMs in resolutions of 1/3, 1, and 2 arc seconds. These seamless DEMs were referred to as the National Elevation Dataset (NED) from about 2000 through 2015 at which time they became the seamless DEM layers under the 3DEP program and the NED name and system were retired. Other 3DEP products include five-meter DEMs in Alaska as well as various source datasets including the lidar point cloud and interferometric synthetic aperture radar (Ifsar) digital surface models and intensity images. All 3DEP products are public domain.