polygon csv wkt "POLYGON ((1 1, 4 1, 4 4, 1 4, 1 1), (2 2, 2 3, 3 3, 3 2, 2 2))" line csv wkt "LINESTRING (0.5 0.5, 4.5 4.5)" point csv wkt "POINT (1 4)" frame csv x,y 0,0 5,0 0,5 5,5