Hi, How can one coerce spatial point to spatial line?
I'm struggling to find a way of coerce a point SPDF object to Lines based in a ID [TARGET_ID] field. Any idea will be very welcome. Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots ..@ data :'data.frame': 28 obs. of 8 variables: .. ..$ ID : int [1:28] 462964 462990 463015 463034 463052 463069 463083 463102 463122 463144 ... .. ..$ TIME_STAMP: POSIXlt[1:28], format: "2009-07-26 09:00:07" "2009-07-26 09:00:13" "2009-07-26 09:00:19" "2009-07-26 09:00:25" ... .. ..$ DAY_PERIOD: int [1:28] 1 1 1 1 1 1 1 1 1 1 ... .. ..$ SEASON : int [1:28] 2 2 2 2 2 2 2 2 2 2 ... .. ..$ TARGET_ID : int [1:28] 108426 108426 108426 108426 108426 108426 108426 108426 108426 108426 ... .. ..$ SPEED : num [1:28] 0.283 0.6 0.4 0.2 0.2 ... .. ..$ HEADING : int [1:28] 134 1 179 179 179 271 123 179 179 90 ... .. ..$ DISTANCE : num [1:28] 1.41 3 2 1 1 ... ..@ coords.nrs : int [1:2] 7 6 ..@ coords : num [1:28, 1:2] -8.71 -8.71 -8.71 -8.71 -8.71 ... .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : NULL .. .. ..$ : chr [1:2] "LONGITUDE" "LATITUDE" ..@ bbox : num [1:2, 1:2] -8.82 38.73 -8.69 38.8 .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : chr [1:2] "LONGITUDE" "LATITUDE" .. .. ..$ : chr [1:2] "min" "max" ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slots .. .. ..@ projargs: chr " +init=epsg:4326 +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +towgs84=0,0,0" Paulo Eduardo Cardoso _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo