Terrain model index
Terrain model of Blaise Castle and Coombe Dingle
Overlays
Terrain
Bedrock
Google Earth
The canyon is missing data rather than an undiscovered geological feature
Controls
Easiest with a mouse with scroll wheel
Right button + mouse move OR Scroll wheel : zoom
Mid button OR CTRL + Right/Left Button : pan
Left button + mouse move : rotate
double click left button - set center of rotation
r to reset viewpoint to initial value
a to show the whole model