Thursday 3 June 2010

Vegetation and Views: Leskernick Revisited Pt. 2

Building the Terrain Model
The Leskernick terrain model is built using Ordnance Survey profile DTM data from the Edina Digimap service. One might equally have used lower resolution panorama data from the Ordnance Survey OpenData collection. The DTM covers an area of approximately 625km2 at a spatial resolution of 5m.  A rapid assessment of areas visible from the top of Leskernick Hill was used as a basis to select a focus area of roughly 16 x 16km, suitable for modelling in CryEngine.

The 5m resolution OS data was degraded to a lower resolution within ArcGIS, before selecting a square area 16384x 16384m and exporting this as a greyscale heightmap.


Using Sandbox a new level 2048 x 2048 units in size at 8m pixel resolution was created and the greyscale heightmap used to generate terrain.  After rough texturing and lighting the result is a CryEngine based map of the of Bodmin Moor centred on Leskernick.  Easy really, although the terrain looks a bit ropey up close and the final product will need some more work in ArcGIS and probably a smaller lower resolution heightmap for CryEngine.