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I am using ArcMap 10.2. I need a DSM file to use for my thesis to run visibility analysis on it, but my case study (Tehran) do not have LiDAR data.

So I am thinking to combine a DEM file with building vector files which includes height.

Does anyone have a solution?

PolyGeo
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Mahsa Rostami
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  • Could this post help you? http://gis.stackexchange.com/q/150832/46073 – Andreas Müller Oct 16 '16 at 16:38
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    Your building heights have elevations representing distance above ground? If so, convert the buildings to a raster layer and add the buildings layer to the DEM file. If your building heights are elevation values then you could convert the buildings to raster and use a CON function to replace the DEM pixels with the building pixels. Of course, this assumes the buildings and the DEM share the same vertical datum. – GBG Oct 17 '16 at 15:15

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I assume you have both raster and vector in the same Coordinate Reference System (CRS).

In ArcGIS 10.2, first use Feature to Raster to convert the building vector to raster. In the field parameter, choose the 'height' column. Try setting the cell size equal to DEM's cell size.

Then, use the Raster Calculator to add values from the 'height raster' to DEM. Something like:

"height_raster" + "DEM"

Alternatively, one can also use Cell Statistics to sum values from both rasters.

A Spatial Analyst license is required with both Raster Calculator and Cell Statistics.

Andre Silva
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