Function reference • oneimpact

Zone of influence (ZoI) functions

Functions to represent the zone of influence

dist_decay() threshold_decay() step_decay() bartlett_decay() tent_decay() linear_decay() gaussian_decay() half_norm_decay() exp_decay(): Zone of Influence (ZOI) functions

plot_zoi1d(): Plot the functions for the nearest and cumulative zone of influence in 1 dimension

Compute zones of influence (ZoI)

Functions to compute the zone of influence for raster maps

calc_zoi(): Calculates the zone of influence from the nearest feature and the cumulative zone of influence of multiple features

calc_zoi_cumulative(): Calculate the cumulative zone of influence of multiple features

calc_zoi_nearest(): Calculate the zone of influence from the nearest feature

Spatial filters

Creating spatial filters to compute a meaningful zone of influence

filter_create(): Create filters or kernel matrices for raster neighborhood analyses

filter_save(): Save kernel/filter matrix to use outside R

Visualization

Functions to help interpreting parameters and visualizing cumulative impacts

rescale_coefficients(): Rescale standardized coefficients back to their original range after model fitting

Raster processing ancillary functions

GRASS GIS ancillary functions to process rasters and prepare inputs for computing zones of influence

grass_binarize(): Binarize continuous raster maps

grass_find_layer(): Find layers within GRASS GIS with multiple patterns

grass_v2rast_count(): Rasterizes a vector counting the number of features in each pixel

raster_rescale(): Rescale raster values

Support for landscape simulation

set_points(): Simulate points in a landscape

set_points_from_raster(): Simulate points using input raster as weights

set_points_sample(): Simulate regular or random points in 2D

isolation() mean_isolation(): Isolation and mean isolation of points in space

Datasets

Datasets for testing the ZoI approach

reindeer: GPS positions for wild reindeer in Norway.

reindeer_area.gpkg: Reindeer area: a polygon vector data for the Setesdal Austhei reindeer herding area

reindeer_cabins.gpkg: Cabins vector data for the reindeer area

reindeer_roads_private.gpkg: Private roads vector data for the reindeer area

reindeer_roads_public.gpkg: Public roads vector data for the reindeer area

sample_area_cabins.tif: Cabin presence raster data for the sample area

sample_area_cabins_count.tif: Cabin count raster data for the sample area

sample_area_roads.tif: Road raster data for the sample area

sample_area.gpkg: Sample area: a polygon vector data

sample_area_cabins.gpkg: Cabins vector data for the sample area

sample_area_roads.gpkg: Road vector data for the sample area