In that case I'd definitely look more at the over() function than that ugly bit I suggested before.
Get your fish info into a SpatialPointsDataFrame Since your polygons are in a SpatialPolygonsDataFrame, I would expect the data frame part has one row per basin, and it contains the basin names or other unique identifier. Loop through the basin names, subsetting the SpatialPolygonsDataFrame for each each basin, then use the over() function the with the fish SpatialPointsDataFrame to tell you which fish are in the current basin. That's an outline; there are obviously lots of details that would be needed. This should work even if, for example, a single basin consists of more than one polygon (presumably non-overlapping). There may be a more efficient way, but I don't know it off the top of my head. -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 5/23/13 6:03 AM, "karengrace84" <kgfis...@alumni.unc.edu> wrote: >I am looking at fish tagging data. I have gps coordinates of where each >fish >was tagged and released, and I have a map of 10 coastal basins of the >state >of Louisiana. I am trying to determine which basin each fish was tagged >in. > > > >-- >View this message in context: >http://r.789695.n4.nabble.com/point-in-polygon-help-tp4667645p4667808.html >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >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. ______________________________________________ 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.
