Message-ID: <CAPU4_4pURuP2Zq_o_oW3E7bPOi9Chxmc=HwsdrWaDOYRc30W6g@mail.gmail.com>
Date: 2016-04-04T19:32:26Z
From: Karla Shikev
Subject: problem with rasterToPolygons x worldclim
Dear all,
Here's an issue that is related to the previous one. In the commands below
I'm trying to make a polygon for all the regions within a range of mean
annual temps. However, rasterToPolygons will draw a square around each
value in the original raster, rather than providing me the actual polygon,
given that resolution. Any hints? Again, any help will be greatly
appreciated.
Karla
_____
library(raster)
r<-getData('worldclim', var='bio', res=10)$bio1
e <- extent(-140,-100, 50, 60)
xx<-crop(r,e)
slice1<-rasterToPolygons(xx, fun = function(x) {x > 40 & x < 60})
plot(slice1)
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