[GRASS-user] Draping map

[Tom van der Putte]

Hi Edmondo,

 

If I get your question correctly:

Resampling data with a spatial resolution of 90m might increase the
resolution of the DEM itself , but it will not increase the detail of the
data, only the number of pixels in your DEM. For instance, when you
downscale an image of 1 x 1 pixel by a factor 2 (both in x and y direction),
the new image will consist of four pixels (2x2). Which all have the same
value as the original 1 pixel. So although the number of pixels has been
increased, the detail remains the same.

 

So in the end there is not much to do about it. 

 

Regards, Tom

 

From: grass-user-bounces at lists.osgeo.org
[mailto:grass-user-bounces at lists.osgeo.org] On Behalf Of Edmondo Elisei
Sent: dinsdag 20 januari 2009 9:50
To: GRASS user list
Subject: [GRASS-user] Draping map

 

Hi,
I've a DEM with 90m resolution and a tif map (1 m res).

In draping the tif on my dem the resultant map in nviz has a very low
quality.
I tried changing the resolution of the DEM (r.resamp) in order to have the
same than tif, but I didn't obtain improvements.

Any advice?

Thanks

regards

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