Check raster CRS for geomorphometry

Reports whether a bathymetric or elevation raster has a CRS and whether that CRS appears to be geographic longitude/latitude.

Usage

check_bathy_crs(x, require_projected = FALSE, warn_lonlat = TRUE)

Arguments

x

A raster-like object accepted by as_bathy().

require_projected

Logical. If TRUE, error when the CRS is missing or longitude/latitude.

warn_lonlat

Logical. If TRUE, warn when the raster is lon/lat.

Value

A tibble with CRS status fields.

Details

Many terrain metrics can be calculated on any numeric grid, but metric interpretation is usually strongest in projected coordinate systems with linear units. Buffers, distances, slope, surface-area ratios, and focal windows are all scale-sensitive.

See also

prepare_bathy(), project_bathy()

Examples

bathy <- read_bathy(blueterra_example("bathy"))
check_bathy_crs(bathy)
#> # A tibble: 1 × 4
#>   has_crs is_lonlat is_projected crs                                            
#>   <lgl>   <lgl>     <lgl>        <chr>                                          
#> 1 TRUE    FALSE     TRUE         "PROJCRS[\"NAD83 / Puerto Rico & Virgin Is.\",…