lalopoint: Find the grid point that is closest to given co-ordinates.

In adeckmyn/meteogrid: Gridded meteorological data

Find the grid point that is closest to given co-ordinates.

Description

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 This function is obsolete.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

point.interp

adeckmyn/meteogrid documentation built on Jan. 13, 2025, 11:02 p.m.