Rasterize stream channels — rasterize_stream_channels • DeltaMultipleBenefits

Convert stream channel line data to rasters for use with "tima" models

Usage

rasterize_stream_channels(
  x,
  template,
  min_length = NULL,
  dir = NULL,
  SDM = "tima",
  landscape_name = "baseline"
)

Arguments

x: object of class sf, or file path to an object than can be read by sf
template: SpatRaster to be used as a template for rasterizing stream channel data
min_length: Optional; minimum length of stream channel to consider
dir: Optional string representing directory passed to terra::writeRaster(), as (dir/SDM/landscape_name). See Details.
SDM: The name of intended species distribution model; by default "tima"
landscape_name: The name of the landscape scenario represented; by default "baseline"

Value

SpatRaster

Details

This function provides support for converting the California Aquatic Resources Inventory (CARI) Streams (lines) data set to a rasterized representation for calculating proportion cover on multiple spatial scales. It uses the same criteria used in the original analysis, lines labeled as 'not shown' or 'Fluvial Subsurface' were excluded. It also provides an option to exclude lines shorter than a minimum length (in meters), which was set to 1 in the original analysis.

The CARI data are freely available for download from SFEI and CDFW.

By default, this layer will be assumed applicable to the tima SDM models and assigned as the "baseline" representation of stream channels unless the SDM or landscape_name parameters are otherwise specified. This function can be re-run for alternative scenarios (or the resulting files simply copied to the appropriate directory) if stream channel locations and densities will not change in the alternative scenario. Otherwise, the result of this function can be manipulated to represent changes to channel locations under alternative scenarios.