Le 04/03/2012 14:14, Ed Linde a écrit :
Hi All,
Can someone help me understand a concept with the SRTM raster. My
understanding is that the raster can be thought of as a uniform grid
with each cell having dimension = "90m x 90m" (for SRTM-1 dataset).
Now I am just wondering if the elevation values are 4 values at each
vertex or boundary point of a cell? or is it one elevation value for
the 90x90 m^2 area covered by the cell? I ask because if its the first
option, then it would mean that every point that falls in the cell has
it's elevation calculated using some sort of interpolation between the
4 corner points of the cell to arrive at this point's altitude. Or do
several points that fall into this 90x90 cell get assigned the same
elevation value?
Would be great if I could get some help understanding this concept
about SRTM rasters.
Cheers,
Ed
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Wouldn't that be a grid of 1°/1201 by 1°/1201 with 1201x1201 elevation
value?
Just a guess.
Yves
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