var S2 = require('../src/s2geometry.js').S2; for(var level = 1; level <= 20; level++) { var success = 0; var total = 0; for (var x = -180.0; x < 180; x += 0.5) { for (var y = -180.0; y < 180; y += 0.5) { var latlng = { lat: x, lng: y }; var cell = S2.S2Cell.FromLatLng(latlng, level); var quadKey = cell.toHilbertQuadkey(); var cell2 = S2.S2Cell.FromHilbertQuadKey(quadKey); if(cell.face != cell2.face || cell.ij[0] != cell2.ij[0] || cell.ij[1] != cell2.ij[1] || cell.level != cell2.level) { /*console.log({ cell: cell, cell2: cell2})*/ } else { success++; } total++; // check equal } } console.log("level:" + level + "\t total:" + total + "\t success:" + success) }