lonlat_to_cell: Convert longitude/latitude to cell ID

In hexify: Equal-Area Hex Grids on the 'Snyder' 'ISEA' 'Icosahedron'

Convert longitude/latitude to cell ID

Description

Converts geographic coordinates to DGGS cell IDs using a grid specification.

Usage

lonlat_to_cell(lon, lat, grid)

Arguments

lon	Numeric vector of longitudes in degrees
lat	Numeric vector of latitudes in degrees
grid	A HexGridInfo or HexData object, or legacy hexify_grid

Details

This function accepts either a HexGridInfo object from hex_grid() or a HexData object from hexify(). If a HexData object is provided, its grid specification is extracted automatically.

Value

Numeric vector of cell IDs

See Also

cell_to_lonlat for the inverse operation, hex_grid for creating grid specifications

Examples

grid <- hex_grid(area_km2 = 1000)
cells <- lonlat_to_cell(lon = c(0, 10), lat = c(45, 50), grid = grid)

# Or use HexData object
df <- data.frame(lon = c(0, 10, 20), lat = c(45, 50, 55))
result <- hexify(df, lon = "lon", lat = "lat", area_km2 = 1000)
cells <- lonlat_to_cell(lon = 5, lat = 48, grid = result)

hexify documentation built on March 1, 2026, 1:07 a.m.