[R-sig-Geo] plot extent and/or convert extent to SpatialPolygons

Agustin Lobo alobolistas at gmail.com
Mon Sep 21 10:05:13 CEST 2015

Is it possible to plot an extent object (i.e. on top of a raster like
it would be done for a polygon with add=TRUE)
Or can I just convert the extent object to SpatialPolygons?


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