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Re: difference between DEM and DSM [message #71972]

Sun, 01 August 2010 02:00

Klemen
Messages: 80
Registered: July 2009

Member

On Jul 30, 10:46 pm, "skymaxw...@gmail.com" <skymaxw...@gmail.com>
wrote:
> i was looking in Wikipedia, but there is very brief information about
> DSM.
>
> i haven't any LIDAR data so there is no point cloud. I have only high
> resolution panchromatic satellite images.
>
> so, to create DSM
> i must interpolate the elevation values (for example from DEM) at each
> point (each pixel) to a grid ?
> how define size of grid ?
>
> Where i can see more details about creating DSM ?
>
> Thanks

Hi, perhaps this is not the right forum to ask such a question. This
is not an IDL issue at all.

However, to generate a DSM, you need data with surface elevation. A
source might be even panchromatic satellite images but then would be
better to use a photogrametric software to generate a DSM. The size of
grid depends on the resolution of your data - use simply the same as
input.

You probably won't find many details on DSM creation, because most are
interested into DEM creation.

Cheers, Klemen

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[Message index]

		Re: difference between DEM and DSM By: Klemen on Sun, 01 August 2010 02:00
		Re: difference between DEM and DSM By: skymaxwell@gmail.com on Fri, 30 July 2010 13:46
		Re: difference between DEM and DSM By: Ben Kamphaus on Fri, 30 July 2010 10:52
		Re: difference between DEM and DSM By: Mort Canty on Fri, 30 July 2010 10:43

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