[R-sig-Geo] How to make a SpatialGrid according to a polygon ?
Roger.Bivand at nhh.no
Tue Nov 30 08:52:37 CET 2010
On Tue, 30 Nov 2010, lu wrote:
> Hellow, I have a polygon and some points, and I want to use the krige
> method to interpolate the polygon.The first step is to make a
> SpatialGrid. But how to make a SpatialGrid which has the same figure as
> the polygon? Thanks!
> [[alternative HTML version deleted]]
Your choice of spsample(..., type="regular") in sp, then convert using
gridded() and fullgrid(), or Sobj_SpatialGrid() in maptools. If you need
precise control over the placing of the grid, use GridTopology() to
construct it by hand before SpatialGrid, based on your choice of the south
wset cell centre.
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