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Class STCostDistance
Extends STTransformRaster
Find the "STCostDistance" raster for a given origin and cost raster.
Computes the cost to move from each pixel in a raster to a pixel with the specified
origin value in the origin raster. If a cost raster is specified then the values
for crossing each pixels are mulitplied by the matching pixels in the cost raster.
Otherwise, a value of 1 is used for each pixel. Crossing values are computed based
on the following for moving vertically or hoziontally to a new pixel:
CostToCrossPixel=0.5*CurrentPixelCost+0.5*NextPixelCost
The following is used to move diagonally to a new pixel:
CostToCrossPixel=0.70710678*CurrentPixelCost+0.70710678*NextPixelCost
Where 0.70710678 is the length of one-half the diagonal of an entire pixel.
Copyright, SchoonerTurtles LLP, 2009
@author Jim Graham
Static Functions
| Returns | Function | Throws |
|---|---|---|
| STRaster |
Find(STRaster TheOrigin,STRaster TheCostRaster,
double NewOriginValue,double NewTolerance) |
Exception |
Static Functions
STRaster Find(STRaster TheOrigin,STRaster TheCostRaster,
double NewOriginValue,double NewTolerance)
Exception
Single function to generate a cost distance raster
Parameters:
TheOrigin - original raster containing the origin points
TheCostRaster - optional cost raster to modify the costs between pixels
NewOriginValue - value within the origin raster that we are computing distances to
NewTolerance - tolerance between cost values to calculate.
Returns: