Round-trip accuracy test

Tests the accuracy of the coordinate conversion functions by converting coordinates to cells and back, measuring the distance between original and reconstructed coordinates.

Usage

hexify_roundtrip_test(grid, lon, lat, units = "km")

Arguments

grid

Grid specification

lon

Longitude to test

lat

Latitude to test

units

Distance units ("km" or "degrees")

Value

List with:

original

Original coordinates

cell

Cell index

reconstructed

Reconstructed coordinates

error

Distance between original and reconstructed

See also

Other coordinate conversion: hexify_cell_id_to_quad_ij(), hexify_cell_to_icosa_tri(), hexify_cell_to_lonlat(), hexify_cell_to_plane(), hexify_cell_to_quad_ij(), hexify_cell_to_quad_xy(), hexify_grid_cell_to_lonlat(), hexify_grid_to_cell(), hexify_icosa_tri_to_plane(), hexify_icosa_tri_to_quad_ij(), hexify_icosa_tri_to_quad_xy(), hexify_lonlat_to_cell(), hexify_lonlat_to_plane(), hexify_lonlat_to_quad_ij(), hexify_quad_ij_to_cell(), hexify_quad_ij_to_icosa_tri(), hexify_quad_ij_to_xy(), hexify_quad_xy_to_cell(), hexify_quad_xy_to_icosa_tri()

Examples

if (FALSE) { # \dontrun{
grid <- hexify_grid(area = 1000, aperture = 3)
accuracy <- hexify_roundtrip_test(grid, lon = 0, lat = 45)
print(accuracy)
} # }