crs_trans_explicit: Transform using explicit coordinate values

In paleolimbot/crs2crs: Generic Coordinate System Transforms

Description

A wk_trans implementation that replaces coordinate values using a vector of pre-calculated coordinates. This is used to perform generic transforms using R functions and system calls that are impossible or impractical to implement at the C level.

Usage

crs_trans_explicit(value, use_z = NA, use_m = NA)

Arguments

value	A vector of coordinates as a wk::xy() used to replace each coordinate in the input in the order it is encountered.
use_z	Used to declare the output type. Use TRUE to ensure the output has that dimension, FALSE to ensure it does not, and NA to leave the dimension unchanged.
use_m	Used to declare the output type. Use TRUE to ensure the output has that dimension, FALSE to ensure it does not, and NA to leave the dimension unchanged.

Examples

trans <- crs_trans_explicit(wk::xy(1:5, 1:5))
wk::wk_transform(rep(wk::xy(0, 0), 5), trans)

paleolimbot/crs2crs documentation built on Jan. 8, 2022, 6:25 a.m.