Return cell centroids instead of shape furing grid generation

[SebKrantz]

Hello, thanks a lot for this package, very useful stuff!

I am encountering memory problems trying to resolve a high-resolution grid for certain cells.

my_grid <- dgshptogrid(world_1km_hex, "data/temporary/districts.shp", cellsize = 0.01, frame = FALSE)

Actually I only need the cell centroids not the entire shape. So an option centroids = TRUE to dgcellstogrid(), dgearthgrid(), dgrectgrid(), dgshptogrid() would be very useful.

Thanks for considering.

[SebKrantz]

Another nice option in this regard would be to be able to select cells from a lower-resolution grid e.g. using a shapefile, and then be able to retrieve all cells from a higher-resolution version of the grid within those cells, i.e. to be able to move between different resolutions.