stplanr (version 0.2.4)

quadrant: Split a spatial object into quadrants

Description

Split a spatial object (initially tested on SpatialPolygons) into quadrants.

Usage

quadrant(sp_obj, number_out = FALSE)

Arguments

sp_obj

Spatial object

number_out

Should the output be numbers from 1:4 (FALSE by default)

Details

Returns a character vector of NE, SE, SW, NW corresponding to north-east, south-east quadrants respectively. If number_out is TRUE, returns numbers from 1:4, respectively.

Examples

# NOT RUN {
data(zones)
sp_obj = zones
(quads = quadrant(sp_obj))
plot(sp_obj, col = factor(quads))
points(rgeos::gCentroid(sp_obj), col = "white")
# edge cases (e.g. when using rasters) lead to NAs
sp_obj = raster::rasterToPolygons(raster::raster(ncol = 3, nrow = 3))
(quads = quadrant(sp_obj))
plot(sp_obj, col = factor(quads))
# }