Helper Function, which transforms SpatialPolygons or coordinates in matrix/data.frame - form to a Simple Feature Polygon
Arguments
- shape
An area as SpatialPolygon, SimpleFeature Polygon or coordinates as matrix/data.frame
- proj
Which Projection should be assigned to matrix / data.frame coordinates
Details
If the columns are named, it will look for common abbreviation to match x/y or long/lat columns. If the columns are not named, the first 2 numeric columns are taken.
See also
Other Helper Functions:
get_grids(),
grid_area(),
hexa_area(),
permutations(),
readintegerSel(),
readinteger(),
splitAt(),
windata_format()
Examples
# \donttest{
library(sf)
df <- rbind(
c(4498482, 2668272), c(4498482, 2669343),
c(4499991, 2669343), c(4499991, 2668272)
)
isSpatial(df)
#> Geometry set for 1 feature
#> Geometry type: POLYGON
#> Dimension: XY
#> Bounding box: xmin: 4498482 ymin: 2668272 xmax: 4499991 ymax: 2669343
#> CRS: NA
#> POLYGON ((4498482 2668272, 4498482 2669343, 449...
Polygon1 <- sf::st_as_sf(sf::st_sfc(
sf::st_polygon(list(cbind(
c(4498482, 4498482, 4499991, 4499991, 4498482),
c(2668272, 2669343, 2669343, 2668272, 2668272)
))),
crs = 3035
))
isSpatial(st_coordinates(Polygon1), 3035)
#> Geometry set for 1 feature
#> Geometry type: POLYGON
#> Dimension: XY
#> Bounding box: xmin: 4498482 ymin: 2668272 xmax: 4499991 ymax: 2669343
#> Projected CRS: ETRS89-extended / LAEA Europe
#> POLYGON ((4498482 2668272, 4498482 2669343, 449...
# }