Dear Listers, The function areapl() of the package splancs computes polygon areas in the coordinate units. This means in square meters when using UTM or Lambert projections but in "square degrees" when using longlat degrees.
Does anybody knows a R function (or an algorithm) to compute the area directly (without projecting or projecting internally), eg in square meters, of a polygon whose node coordinates are given in decimal degrees? Thanks for any hint, Patrick _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
