Calculates slope gradients for routes using digital elevation model (DEM) raster data.
Usage
slope_raster(
routes,
dem,
lonlat = sf::st_is_longlat(routes),
method = "bilinear",
fun = slope_matrix_weighted,
terra = has_terra() && methods::is(dem, "SpatRaster"),
directed = FALSE
)Arguments
- routes
An sf object containing linestring geometries
- dem
A raster object containing elevation data
- lonlat
Logical, whether coordinates are longitude/latitude (default: auto-detected)
- method
Method for raster extraction (default: "bilinear")
- fun
Function for slope calculation (default: slope_matrix_weighted)
- terra
Logical, whether to use terra package (default: auto-detected)
- directed
Logical, whether to calculate directed slopes (default: FALSE)