dggridR (version 3.1.0)

dgearthgrid: Return the coordinates constituting the boundary of cells for the entire Earth

Description

Note: If you have a high-resolution grid this may take a very long time to execute.

Usage

dgearthgrid(dggs, savegrid = NA, return_sf = TRUE)

Value

Returns an sf object. If !is.na(savegrid), returns a filename.

Arguments

dggs

A dggs object from dgconstruct().

savegrid

If savegrid is set to a file path, then a shapefile containing the grid is written to that path and the filename is returned. No other manipulations are done. Default: NA (do not save grid, return it)

return_sf

logical. If FALSE, a long-format data frame giving the coordinates of the vertices of each cell is returned. This is is considerably faster and more memory efficient than creating an sf data frame.

Examples

# \donttest{
library(dggridR)
dggs         <- dgconstruct(res=20)
res          <- dg_closest_res_to_spacing(dggs,spacing=1000,round='down',metric=FALSE)
dggs         <- dgsetres(dggs,res)
gridfilename <- dgearthgrid(dggs,savegrid=tempfile(fileext=".shp")) #Save directly to a file
# }