Background information on OS MasterMap® Topography Layer Building Height Attribute (BHA) and details of the attributes supplied by Ordnance Survey can be found on the Building Height Attribute Overview page.
Download the following datasets for your area of interest from Digimap using the OS Data Download application:
The steps required to visualise the data in 3D using AutoCAD Map 3D are described below:
At the Open - Foreign DWG file window click Continue opening DWG file.
The DEM will be displayed using a default palette, this can be modified by double clicking on the layer in the task pane to bring up the Style Editor window where you can adjust the colours and number of classes used to display the data.
Additional raster data can be added using the Connect to Data menu, this will appear draped over the DEM by default (although the resolution may appear relatively poor).
To navigate in 3D use the Orbit control on the map navigation control bar:
The screen grab below shows the final visualisation centred on Edinburgh using OS Vector Map Local Raster as the surface layer.
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