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Crop, mask, resample, and project bathymetry

Source: R/prepare.R
crop_bathy.Rd

Small wrappers around terra raster-preparation operations with bathymetry input validation.

Usage

crop_bathy(x, extent, filename = "", overwrite = FALSE)

mask_bathy(x, mask, filename = "", overwrite = FALSE)

resample_bathy(x, y, method = "bilinear", filename = "", overwrite = FALSE)

project_bathy(x, crs, method = "bilinear", filename = "", overwrite = FALSE)

Arguments

x

A raster-like object accepted by as_bathy().

extent

Crop extent.

filename

Optional output raster path.

overwrite

Logical. Allow overwriting filename.

mask

Polygon/vector mask.

y

Template raster used for resampling.

method

Interpolation method passed to terra.

crs

Target CRS.

Value

A terra::SpatRaster.

Details

These helpers preserve depth sign and raster values except for interpolation effects introduced by resampling or projection.

See also

prepare_bathy()

Examples

bathy <- read_bathy(blueterra_example("bathy"))
zones <- terra::vect(blueterra_example("zones"))
crop_bathy(bathy, terra::ext(zones[zones$site_id == "slope", ]))
#> class       : SpatRaster
#> size        : 90, 189, 1  (nrow, ncol, nlyr)
#> resolution  : 19.98372, 19.98372  (x, y)
#> extent      : 134960.3, 138737.2, 204151.7, 205950.2  (xmin, xmax, ymin, ymax)
#> coord. ref. : NAD83 / Puerto Rico & Virgin Is. (EPSG:32161)
#> source(s)   : memory
#> varname     : laparguera_slope_bathy
#> name        :     bathy_m
#> min value   : -427.298889
#> max value   :  -15.878815