Gets the footprint around a pixel

This function returns the coordinates of all the points in the surrounding of a given list of spatial points. The surrounding is based on walking distance within radius, using the transition matrix T.CG associated to the map pop.map

GetFootprintWalkingTime(pos, radius, pop.map, T.GC)

Arguments

pos

coordinates of the given points

radius

dimension of the radius around the point (same dimension as T.GC, e.g minutes)

pop.map

raster map containing population densities

T.GC

transition matrix T.CG associated to the map pop.map

Value

a raster