Hi, You may want to check the package sp. There is one function called "point.in.polygo" that might do what you want. Good luck, Monica
--------------------- >Message: 32 >Date: Thu, 5 Feb 2009 14:51:36 +0000 >From: baptiste auguie >Subject: Re: [R] maptools: Test if point is in polygon >To: Aleksandr Andreev >Cc: "r-help@r-project.org" >Message-ID: >Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes >I don't know about the maptools package but one general way to do this >would be to compute the convex hull (?chull) of the augmented set of >points and test if the point belongs to it. >Hope this helps, >baptiste >On 5 Feb 2009, at 13:21, Aleksandr Andreev wrote: > In R's maptools package, is there a built-in function to test if a > given point is "inside" a given polygon on the map? The map was > loaded from an ESRI Shapefile. The point's latitude and longitude are > known. > > Thank you! > > Aleks > > -- > ------------------------ > Aleksandr Andreev > Fulbright Fellow > Graduate School of Management > St Petersburg State University ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
