oce (version 0.9-13)

map2lonlat: Find lon-lat coordinates of a point on a map

Description

Find lon-lat coordinates of a point on a map

Usage

map2lonlat(xusr, yusr, tolerance=1e-4)

Arguments

xusr, yusr

coordinates of points on the map.

tolerance

tolerance for misfit.

Value

• A list containing longitude and latitdue.

Details

The location is inferred by trying to invert the mapproject function. The inversion is done by using optim to find a good match between a point in geographical space and plot space, and this match is not always good, being dependent on a starting guess.

See Also

See mapPlot for general information on plotting maps, including other functions.