Description Usage Arguments Value See Also Examples
wkt_coords
extracts lat/long values from WKT polygons,
specifically the outer shell of those polygons (working on the assumption that
said outer edge is what you want).
Because it assumes coordinates, it also assumes a sphere - say, the earth - and uses spherical coordinate values.
1 | wkt_coords(wkt)
|
wkt |
a character vector of WKT objects |
a data.frame of four columns; object
(containing which object
the row refers to), ring
containing which layer of the object the row
refers to, lng
and lat
.
wkt_bounding
to extract a bounding box,
and wkt_centroid
to extract the centroid.
1 2 3 4 5 6 7 | wkt_coords("POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))")
# object ring lng lat
# 1 1 outer 30 10
# 2 1 outer 40 40
# 3 1 outer 20 40
# 4 1 outer 10 20
# 5 1 outer 30 10
|
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