Convert a terra SpatRaster to a maxentcpp GridFloat — maxent_grid_from

Converts a single-layer terra::SpatRaster into a maxentcpp GridFloat external pointer. The raster must have exactly one layer and square cells (equal x and y resolution).

Usage

maxent_grid_from_terra(r, name = NULL)

Arguments

r: A single-layer terra::SpatRaster object.
name: Character: grid name (default: layer name from the raster).

Value

External pointer to a GridFloat C++ object.

Details

NA values in the raster are stored as NODATA (sentinel -9999).

Requires the terra package (listed in Suggests).

For the raster package, an equivalent workflow is:


  library(raster)
  r <- raster("bio1.tif")
  mat <- as.matrix(r)
  e <- extent(r)
  g <- maxent_grid_from_matrix(mat, xll = e@xmin, yll = e@ymin,
                               cellsize = res(r)[1],
                               name = names(r))

Examples

if (FALSE) { # \dontrun{
library(terra)
r <- rast("bio1.tif")
g <- maxent_grid_from_terra(r)
maxent_grid_info(g)
} # }