Split a spatial object into quadrants
Split a spatial object (initially tested on SpatialPolygons) into quadrants.
quadrant(sp_obj, number_out = FALSE)
sp_obj |
Spatial object |
number_out |
Should the output be numbers from 1:4 (FALSE by default) |
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.
Other geo:
bbox_scale(),
gclip(),
geo_bb_matrix(),
geo_bb(),
mapshape_available(),
mapshape(),
reproject()
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))
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