[GRASSLIST:7793] RE: SRTM DEM data validation (Not a GRASS specific thread)

Jonathan Greenberg jgreenberg at arc.nasa.gov
Thu Aug 4 20:05:35 EDT 2005


	I think the easiest way to do it is to take the DEM value and your
own measurements and do a regression between the two.  If there's a tight
fit (low R2) then you can use the slope and offset to correct one set of
data to "fit" another.



Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Office: 650-604-5896
Cell: 415-794-5043
AIM: jgrn307
MSN: jgrn307 at hotmail.com
-----Original Message-----
From: owner-GRASSLIST at baylor.edu [mailto:owner-GRASSLIST at baylor.edu] On
Behalf Of Armando Scalise
Sent: Thursday, August 04, 2005 3:02 PM
To: GRASS international
Subject: [GRASSLIST:7792] SRTM DEM data validation (Not a GRASS specific


I have downloaded an SRTM DEM (3 arc sec) for parts of Patagonia.

I need to validate the DEM against my own set of topographic data.  I 
would like to get pointers to documents describing validation methods.  
Anyone in this list who can provide leads and hints to access available 


Armando Scalise

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