Terrain surface convexity as proposed by Iwahashi & Pike (2007) for subsequent terrain classification.

Name	Type	Identifier	Description	Constraints
Input
Elevation	grid, input	DEM
Output
Convexity	grid, output	CONVEXITY
Options
Laplacian Filter Kernel	choice	KERNEL		Available Choices: [0] conventional four-neighbourhood [1] conventional eight-neihbourhood [2] eight-neihbourhood (distance based weighting) Default: 0
Type	choice	TYPE		Available Choices: [0] convexity [1] concavity Default: 0
Flat Area Threshold	floating point number	EPSILON		Minimum: 0.000000 Default: 0.000000
Scale (Cells)	integer number	SCALE		Minimum: 1 Default: 10
Method	choice	METHOD		Available Choices: [0] counting cells [1] resampling Default: 1
Weighting Function	choice	DW_WEIGHTING		Available Choices: [0] no distance weighting [1] inverse distance to a power [2] exponential [3] gaussian Default: 3
Power	floating point number	DW_IDW_POWER		Minimum: 0.000000 Default: 2.000000
Bandwidth	floating point number	DW_BANDWIDTH	Bandwidth for exponential and Gaussian weighting	Minimum: 0.000000 Default: 0.700000