[R-sig-Geo] SpatialPixels - other implementations?
Roger.Bivand at nhh.no
Tue Jun 5 09:46:29 CEST 2007
On Tue, 5 Jun 2007, Michael Sumner wrote:
> I'm interested in the origin of the idea behind sp's SpatialPixels.
> What other software/s implement this concept, of storing a sparse grid
> of pixels?
Directly from the Cells object in Terralib:
(they had lots of images with clouds, that is NA, and found the direct
database record a better representation than repeated lookups on raster
cells with content).
> I'm aware of the SparseMatrix in R, and I haven't explored that thread -
> are there specifically GIS implementations of this idea?
> Cheers, Mike.
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