Point in Polygon Overlay Memory Error
On Mon, 25 Aug 2014, Francesco Tonini wrote:
Dear all, I keep getting a memory error (vector too big) when overlaying hundreds of thousands of points with a polygon layer. The computer I am running this on is quite powerful, thus the error is just internal to R because of reaching a vector allocation too big in size. Is there any workaround to execute this operation? My goal is to overlay several point onto a habitat polygon layer, and remove all points falling outside that polygon.
Please recall that nobody can see over your shoulder. Always state the output of sessionInfo(), the code causing the error, the output of traceback() after the error, and some details of the objects concerned (counts of points, for example). Are you for example using over() methods from the sp package? Powerful may also be misconfigured, so available RAM and any adjustments you have made to R defaults should be declared. Do read the posting guide! Roger
Any help is much appreciated. Thank you, Francesco
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Roger Bivand Department of Economics, Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 91 00 e-mail: Roger.Bivand at nhh.no