Fifth International World Wide Web Conference
Multiresolution Terrain Model
Texture-mapping
of image onto elevation grid
Subdivision
of the model into 16x10 quadrants that can be handled independently
Image simplification
Resizing to fit into machine texture memory
Geometry simplification
Regular grid converted to irregular triangle net
Three levels of detail (LOD) per quadrant created by triangle decimation
Entire Model complexity: 41987-108617 triangles
Automatic trading of quality/speed at rendering time speed
Hyperlinks from each quadrant to a
high resolution version
of the surrounding region
User-controlled quality increase
Virtual Sardinia: A Large-Scale Hypermedia Regional Information System
(E.Gobbetti,A.O.Leone)
Fifth International World Wide Web Conference