MODELLING IN GIS 

TIN

Triangular Irregular Network

TIN model

Vector Grid

Vectorial Grid

DEM model

DEM

Methods for identifying surface significant points

the skeleton method of Fowler and Little (1979)

the filter or VIP (Very Important Point Chen and Guevara 1987

the hierarchy method DeFlorini et al 1984

the drop heuristic method

the skeleton method of Fowler and Little
DTMs
THE TIN MODEL
LIDAR DATA POINTS FILTERING USING ARCGIS’ 3D AND SPATIAL ANALYST
Modelling as a Process

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