crop_from_click: Interactively crop a 'raster'

In edwardlavender/flapper: Routines for the Analysis of Passive Acoustic Telemetry Data

Interactively crop a raster

Description

Interactively crop a raster to a boundary box specified by mouse clicks.

Usage

crop_from_click(x, plot = TRUE, ...)

Arguments

x	A raster.
plot	A logical input that defines whether or not to plot x before and after cropping.
...	Additional arguments passed to pretty_map to customise plots.

Details

The function is implemented as follows:

1. The function plots the supplied raster (x), if plot = TRUE;

2. Boundary coordinates delineating the area to which x should be cropped are defined by mouse clicks on the plot;

3. The plotted raster is cropped using the minimum and maximum x and y coordinates of mouse clicks, via crop;

4. The cropped raster is plotted, if plot = TRUE;

5. The cropped raster is returned.

Value

The function returns a raster and, if plot = TRUE, a plot of the area before/after cropping.

Author(s)

Edward Lavender

Examples

if (interactive()) crop_from_click(dat_gebco)

edwardlavender/flapper documentation built on Jan. 22, 2025, 2:44 p.m.