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Elevation data are taken from a digital elevation model.
Aerial photography, land cover data, and digital elevation models all provide coverage data.
In geographic information system, point clouds are one of the sources to make digital elevation model of the terrain.
Heightmaps are commonly used in geographic information systems, where they are called digital elevation models.
No lunar peaks with eternal light have been found and none seem likely based on the use of radar digital elevation model simulations.
Digital elevation models may be prepared in a number of ways, but they are frequently obtained by remote sensing rather than direct Surveying.
Users convert further data (like satellite imagery and digital elevation models) from other sources and import them.
This includes the automatic generation of river channels from a Digital elevation model so that a catchment simulation can be set up rapidly.
Sometimes the earliest data for the glacier surface profiles is from images that are used to make topographical maps and digital elevation models.
It can also use DEM (digital elevation model) files, and other graphic surface maps for rendering.
Digital Elevation Models, for example, have often been created not from new remote sensing data but from existing paper topographic maps.
He created a water flow routing algorithm, which specifies how to eliminate spurious pits from digital elevation models.
A typical example is geographic information systems, especially digital elevation models, where the full data set easily exceeds several gigabytes or even terabytes of data.
Shaded relief today can be created digitally, using a digital elevation model (DEM) as its basis.
Google Earth overlays orthophotos or satellite imagery onto a digital elevation model to simulate 3D landscapes.
Satellite radar mapping is one of the major techniques of generating Digital Elevation Models (see below).
Digital elevation models for GIS applications.
Digital elevation model Radars on the Space Shuttle:
Triangulated irregular network, a vector source for topography data, often rasterized as a (raster) digital elevation model.
Each base map topic may include sub-topics such as digital elevation model, slope, and aspect sub-topics under topography.
This effect can be exploited to calculate the topographic height, and used to produce a digital elevation model (DEM).
The characteristics of the river with the network of channels and lagoons are distinguishable from satellite imagery and digital elevation models.
The tool processes upward-looking hemispherical view shed algorithms to calculate insolation for each location on the digital elevation models.
Surface details of a portion of Taylor Valley can be seen in the shaded relief generated from the 2-meter digital elevation model in this figure.
GTOPO30 is a digital elevation model for the world, developed by USGS.