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Sentinel-2 is an Earth observation mission from the Copernicus Programme that acquires optical imagery at high spatial resolution (10 m to 60 m) over land and coastal waters. The mission's Sentinel-2A and Sentinel-2B satellites were joined in orbit in 2024 by a third, Sentinel-2C, and in the future by Sentinel-2D, eventually replacing the A and ...
Sentinel-2A is a European optical imaging satellite launched in 2015. It is the first Sentinel-2 satellite launched as part of the European Space Agency 's Copernicus Programme . The satellite carries a wide swath high-resolution multispectral imager with 13 spectral bands.
During October 2011, version 2 of Global Digital Elevation Model was publicly released. [17] This is considered an improvement upon version 1. These improvements include increased horizontal and vertical accuracy, [ 18 ] better horizontal resolution, reduced presence of artifacts, and more realistic values over water bodies. [ 3 ]
DTED (or Digital Terrain Elevation Data) is a standard of digital datasets which consists of a matrix of terrain elevation values, i.e., a Digital Elevation Model.This standard was originally developed in the 1970s to support aircraft radar simulation and prediction.
The National Elevation Dataset (NED) consists of high precision topography or ground surface elevation data (digital elevation model) for the United States. It was maintained by the USGS and all the data is in the public domain. Since the 3D Elevation Program came online, the NED was subsumed [1] into The National Map as one of its layers of ...
This image contains data from a satellite in the Copernicus Programme, such as Sentinel-1, Sentinel-2 or Sentinel-3. Attribution is required when using this image. Attribution is required when using this image.
While in U.S. Air Force use, the system produces intelligence collected by the U-2 Dragonlady, RQ-4 Global Hawk, MQ-9 Reaper and MQ-1 Predator. [1] The previous system of similar use was the Deployable Ground Station (DGS), which was first deployed in July 1994. Subsequent version of DGS were developed from 1995 through 2009. [1]
Other definitions equalise the terms DEM and DTM, [7] equalise the terms DEM and DSM, [8] define the DEM as a subset of the DTM, which also represents other morphological elements, [9] or define a DEM as a rectangular grid and a DTM as a three-dimensional model . [10] Most of the data providers (USGS, ERSDAC, CGIAR, Spot Image) use the term DEM ...