标签: coordinates delete-row removeall remove spatial-data-frame
如何将data.frame中的坐标限制为r中的美国?
spdf <-SpatialPointsDataFrame(coords = biomod.data [,c(“ Lon”,“ Lat”))],data = biomod.data, proj4string = CRS(“ + proj = longlat + datum = WGS84 + no_defs + ellps = WGS84 + towgs84 = 0,0,0”))