CODEWITHSUNDEEP
rraster
Alex
Alex

Reputation: 81

Determining the size of grid cells in a raster

Is there a good method for determining the size of individual grid cells in a RasterLayer? I can access the resolution but I need the actual size in km^2. I've tried using the area() with my raster but it's not finding the window. I've also tried creating a SpatialGridDataFrame from my raster but have had no luck computing the area of each individual grid cell. Any help would be appreciated.

Upvotes: 5

Views: 4360

Answers (1)

Robert Hijmans
Robert Hijmans

Reputation: 47061

The cells size is the product of the x and y resolution prod(res(x)) if you have a planar coordinate reference system. Otherwise, if your crs is longitude/latitude, cell size will change with latitude, and you can indeed use the area function to get the size of each cell.

I take it that "it's not finding the window." refers to this error message Error in as.owin.default(w) : Can't interpret W as a window.

This is a name conflict with spatstat. So either do not load spatstat or call the raster function explicitly raster::area(x).

Upvotes: 6

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