TileKey¶

struct nmeasim::app::map::TileKey · Applications

Address of one tile: its zoom level and its column and row at that level.

Declared in src/app/map/tile_math.hpp (line 41)

Valid keys have zoom in [0, 30] and x and y in [0, 2^zoom); nothing checks this. Keys are ordered by zoom, then x, then y.

Summary¶

Public member functions

Name	Description
`operator<=>()`	Compares two keys member by member in the order zoom, x, y.

Public data members

Name	Description
`zoom`	Zoom level of the tile.
`x`	Column, counted eastwards from longitude -180.
`y`	Row, counted southwards from the northern limit `kMaxLatitudeDeg`.

auto operator<=>(const TileKey&) const = default

Compares two keys member by member in the order zoom, x, y.

Returns auto: The ordering of the first member that differs, or equality.

int zoom{0}

Zoom level of the tile.

int x{0}

Column, counted eastwards from longitude -180.

int y{0}

Row, counted southwards from the northern limit kMaxLatitudeDeg.