tile-to-geo

Transform lat,zoom and lng,zoom to tile coordinates and back for spherical mercator projection.

Install

npm install tile-to-geo

Usage

assert(tu.lng_x(45, 1), 1);
assert(tu.lat_y(-45, 1), 1);

assert(tu.lng_x(160, 2), 3);
assert(tu.lat_y(-80, 2), 3);

assert(tu.x_lng(0, 2), -180);
assert(tu.y_lat(0, 2), 90);

assert(tu.x_lng(4, 2), 180);
assert(tu.y_lat(4, 2), -90);

Tests

npm test