Vertical dimensions can be obtained from
UGC NET - 2013,
Answer: D
The vertical dimensions can be obtained from a DEM, the SRTM and topographic sheets, so the answer is all the above, option (D). A digital elevation model stores heights as a grid, the Shuttle Radar Topography Mission produced such a model for most of the world, and a topographic sheet shows heights by contour lines and spot heights. Each of options (A), (B) and (C) is a source of height data, so no single one is the complete answer. The height of a place is read from contour lines on a sheet and from the grid of values of the models, so all three give the vertical dimension.
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