How to convert a DSM to DEM

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10-31-2013 09:48 AM
MARIAAIVAZOGLOU
New Contributor
Hallo all,

I have a Digital Surface Model (DSM) with a cell size of 0.8x 0.8 and I want to convert it to DEM. Thus I want to get rid of elevated objects such as buildings and trees. Does anybody know if there is an available tool for this.

I will highly appreciate any advice.

Maria
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3 Replies
NidhinKarthikeyan
Regular Contributor II
Take a look at this forum post.

You can also try using Free Open Source S/W, Q GIS, SAGA GIS.
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larryzhang1
New Contributor III
...
have a Digital Surface Model (DSM) with a cell size of 0.8x 0.8 and I want to convert it to DEM. Thus I want to get rid of elevated objects such as buildings and trees. Does anybody know if there is an available tool for this.

...


Maria,

If your DSM is refereed to a dataset, which contains bare DEM with 3D object heights on it, it is challenging for ArcGIS (any GIS approaches) to practically exclude 3D objects and technically convert into 'meaningful�?? DEM, in particular, in urban areas.

However, if your DSM is referred to the data model in engineering/geomatics literature, which is constructed from 0.8-m optical data (stereo-pair imagery, or LiDAR cloud points), accurate 'bare' DEM (and/or 3D city model) can be automatically classified by advanced algorithms within remote sensing packages like Leica LPS or TerraScan, ...
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leostalin
New Contributor

Use SimActive DSM to DTM module..

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