Description Usage Arguments Value Note References Examples
Read Polygons out of a KML file.
1 | kml_polygons(x, ns = "d1", verbose = TRUE, fuse = FALSE, ...)
|
x |
A KML source. See kml_read. |
ns |
The name of the namespace to extract from: defaults to |
verbose |
Whether to report invalid coordinates and/or altitudes below
sea level; defaults to |
fuse |
Whether to fuse multi-polygons into a single element; defaults
to |
... |
Arguments passed to read_xml. See kml_read. |
A tibble containing the folder
(layer),
name
, description
, styleUrl
and geographic coordinates
(longitude
, latitude
and altitude
) of the first
Polygon contained within each Placemark element of the KML source.
Other Placemark elements will be ignored.
If there are no Polygons in the KML source, the function returns NULL
.
If there are no Folders in the KML source, the folder
variable will be
filled with NA
.
The function only extracts the outer bounds of Polygon elements, and it only extracts the first Polygon out of each Placemark element. As a result, multi-polygons built into <MultiGeometry> elements are not fully supported: only the first Polygon will be present in the results.
Google Developers. KML Reference: <Polygon> Element. https://developers.google.com/kml/documentation/kmlreference#polygon
1 2 3 4 | # demo data: U.S. Civil War map
# see ?states for details
f <- system.file("extdata", "states.kml.zip", package = "tidykml")
kml_polygons(f)
|
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