Find the grid point that is closest to given co-ordinates. — lalopoint • meteogrid

In the given grid, the point closest to the (Lon,Lat) co-ordinates is found. This function is obsolete. Use point.interp.

Usage

lalopoint(geo, lon, lat, minimise='proj', mask=NULL)

Arguments

geo: A geofield, FAfile, geodomain, FAframe object.
lon,lat: longitude and latitude.
minimise: Which "distance" to minimise: can be 'lalo' (minimise lat-lon) or 'proj' (minimise geographical distance in the projection).
mask: Take the closest point where mask==TRUE.

Value

A list with following members:

data: The value of the field in the chosen grid point. If data is not a geofield, this is set to NA.
lonlat: The actual coordinates of the chosen grid point.
index: The matrix indices of the chosen grid point.

See also