Geovisionary

Simple Model (DEM and Image overlay)

Intro

Geovisionary is a software package developed by the British Geological Survey (BGS) and Virtalis for creating visualisations of large and complex datasets. The data can be viewed within a 3D environment demonstrating the spatial relationships. We are currently running the 1.0.5.0 version of the software which only supports DEMs for height information where as the latest version will now accept point clouds.

The following instructions will show one method of ARSF data to create a simple elevation model with a image overlay. Firstly the data needs to be converted into a usable format, using a the converter_gui application (this is external to Geovisionary itself).

Firstly taking a pre-existing DEM (see DEM instructions), convert into grey float format under the format tab. Next convert the overlay images (GeoTiff seemed to be the most successful format) into RGB. These conversions can sometimes take a bit of time depending on the size of the files. A number of different image types are supported but GeoTiffs were the most successful format from previous attempts. Also it should be noted that if image overlap then areas can be occluded by another image. It is therefore best to use a mosaicked image of the whole AOI (area of interest).

Once the files have been converted they can then be loaded into Geovisionary. The converted DEM files need to be loaded in as height data. This should then create a 3D model of the terrain. If your creating this model with a standard ARSF DEM it is likely the the resolution of the model will vary across the scene. This is as a result of other height information data being using during the generation of the DEM e.g. ASTER data.

Creating a movie (and changing layers?)