Something like this should do the trick.... plot(shp) # Plot your shapefile in Lambert projection plot(spTransform(pts, shp@proj4string), add = T) # Add points converted to Lambert
Cheers, Lyndon On Sun, Feb 26, 2012 at 12:24 PM, <gregor.hochsch...@gmx.de> wrote: > Hi, > > I am not sure whether I am expressing myself correctly but I have the > following problem: > The shapefile I have is in Lambert Conformal Conic with coordinates like > this (I not even sure whether the Lambert projection is the problem): > min max > x 913175.1 1067382.5 > y 120121.9 272844.3 > > Plotting works fine but now I want to add points based on longitude and > latitude (NYC area around -73 and 40). > > How can I convert my shapefile to longitude and latitude coordinates? Or > alternatively, how can I convert my point locations? > > > Thanks! > > > > The shapefile is from here: > http://www.nyc.gov/html/dcp/html/bytes/dwndistricts.shtml > (NYC Census Track 2010 file) > > Here are more information about the shapefile: > http://www.nyc.gov/html/dcp/html/bytes/meta_dis_censustracts2010.shtml > > Map Projection Name: Lambert Conformal Conic > Lambert Conformal Conic: > Standard Parallel: 40.666667 > Standard Parallel: 41.033333 > Longitude of Central Meridian: -74.000000 > Latitude of Projection Origin: 40.166667 > False Easting: 984250.000000 > False Northing: 0.000000 > -- > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
