R: Is 'PROJ library >= 6' available

ok_proj6 {PROJ} | R Documentation

## Is 'PROJ library >= 6' available

### Description

Test for availability of 'PROJ' system library version 6 or higher.

### Usage

    ok_proj6()

### Details

On unix-alikes, this function is run in `.onLoad()` to check that version 6 functionality is available. On Windows, the load process sets the data file location with the version 6 API, and that is used as a test instead.

If 'PROJ' library version 6 is not available, the package still compiles and installs but is not functional.

The lack of function can be simulated by setting `options(reproj.mock.noproj6 = TRUE)`, designed for use with the reproj package.

### Value

logical, `TRUE` if the system library 'PROJ >= 6'

### Examples

    ok_proj6()

[Package PROJ version 0.4.0 Index]