# Surface Specific Points

(c) 2001 by O.Conrad
References:
Peucker, T.K. and Douglas, D.H., 1975:
'Detection of surface-specific points by local parallel processing of discrete terrain elevation data',
Computer Graphics and Image Processing, 4, 375-387

## Parameters

Grid system
Grid system
  Grid system
Elevation
Input Grid
Result
Output Grid
Method
Choice
  Algorithm for the detection of Surface Specific Points
  Available choices: Mark Highest Neighbour, Opposite Neighbours, Flow Direction, Flow Direction (up and down), Peucker & Douglas
Threshold
Floating point
  Threshold for Peucker & Douglas Algorithm