Given an rsgeo class object, extract the object's coordinates as a data frame.
Empty or missing geometries are ignored.
Value
A data.frame with columns x, y. Additional columns are returned based
on the geometry type. Additional columns are:
idline_id: refers to theLineStringID forrs_LINESTRING, or the componentLineStringin aMultiLineString, or as the ring ID for aPolygon.multilinestring_idpolygon_idmultipolygon_id
Examples
pnt <- geom_point(3, 0.14)
mpnt <- geom_multipoint(1:10, 10:1)
ln <- geom_linestring(1:10, 10:1)
ply <- geom_polygon(c(0, 1, 1, 0, 0), c(0, 0, 1, 1, 0))
coords(pnt)
#> x y
#> 1 3 0.14
coords(mpnt)
#> x y id
#> 1 1 10 1
#> 2 2 9 1
#> 3 3 8 1
#> 4 4 7 1
#> 5 5 6 1
#> 6 6 5 1
#> 7 7 4 1
#> 8 8 3 1
#> 9 9 2 1
#> 10 10 1 1
coords(ln)
#> x y line_id
#> 1 1 10 1
#> 2 2 9 1
#> 3 3 8 1
#> 4 4 7 1
#> 5 5 6 1
#> 6 6 5 1
#> 7 7 4 1
#> 8 8 3 1
#> 9 9 2 1
#> 10 10 1 1
coords(union_geoms(rep(ln, 2)))
#> x y line_id multilinestring_id
#> 1 1 10 1 1
#> 2 2 9 1 1
#> 3 3 8 1 1
#> 4 4 7 1 1
#> 5 5 6 1 1
#> 6 6 5 1 1
#> 7 7 4 1 1
#> 8 8 3 1 1
#> 9 9 2 1 1
#> 10 10 1 1 1
#> 11 1 10 2 1
#> 12 2 9 2 1
#> 13 3 8 2 1
#> 14 4 7 2 1
#> 15 5 6 2 1
#> 16 6 5 2 1
#> 17 7 4 2 1
#> 18 8 3 2 1
#> 19 9 2 2 1
#> 20 10 1 2 1
coords(ply)
#> x y line_id polygon_id
#> 1 0 0 1 1
#> 2 1 0 1 1
#> 3 1 1 1 1
#> 4 0 1 1 1
#> 5 0 0 1 1
coords(union_geoms(rep(ply, 2)))
#> x y line_id polygon_id multipolygon_id
#> 1 1 0 1 1 1
#> 2 1 1 1 1 1
#> 3 0 1 1 1 1
#> 4 0 0 1 1 1
#> 5 1 0 1 1 1