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2013 Sep 19
3
How do I ensure that the polygon in spatstat::owin(poly=<polygon>) does not have “negative area”
...e fed to owin(). So I tried loading a massachusetts shape file (I am totally taking guesses at this point).: x <- readShapePoly("../Geog/OUTLINE25K_POLY") ## The shape file for MASS, loaded from MassGIS website mass.poly <- x <- readShapePoly("../Geog/OUTLINE25K_POLY", force_ring=T, delete_null_obj=T) ## I got following error whether or not I used force_ring mass.owin <- as(mass.poly, "owin") Checking 1006 polygons...1, Polygon 1 contains duplicated vertices [Checking polygon with 91844 edges...] 2, 3, .. [etd 1:21:52] ....10 [etd 36:12] ..... [etd 23:10]...