[gdal-dev] elevetions from ASTER GDEM V2

[Jean-Claude Repetto]

On 24/01/2013 20:43, Elias Kotsifis wrote:
> Hello
>  
> I want to calculate the elevation of any point on earth, giving lat,
> Long (for example like google elevation Api, or the earth tools:
> http://www.earthtools.org/webservices.htm # cheigit) based the ASTER
> GDEM MODEL V2.
> I went to download data from there, and gives me geotiff files. Overall
> for the entire planet is 22,702 granule with 400GB size
> Then what should I do?
>  

Hello,

Generally, a bilinear or bicubic interpolation is used to compute the
elevation of the point.
You should read this paper :
http://www.geocomputation.org/1999/082/gc_082.htm

Jean-Claude