Hi Deepthi Patric,
As far as i know, elevation contours can be extracted from openly
available data sets from ASTER / SRTM / ALOS satellite imagery services.
Each one has different spatial resolution and elevation accuracy
depending upon the measurement (remote sensing) technology.
Do take a look at : https://wiki.openstreetmap.org/wiki/Relief_maps
Geomorphometry and hydrological analysis depend upon the Digital
Elevation Models derived from such preprocessed data sets.
Regards,
Ganesh
On 05/31/2018 04:15 PM, Deepthi Patric wrote:
How does the elevation map work ? Does it work by extracting contours
from SRTM ? Or does it use point-sampling tool ?
Regards,
Deepthi J
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