53 lines
996 B
JavaScript
53 lines
996 B
JavaScript
var S2 = require('s2geometry-node');
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// Provo, UT (Center St)
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//var lat = 40.2574448;
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//var lng = -111.7089464;
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// Startup Building in Provo
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//var lat = 40.2262363;
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//var lng = -111.6630927;
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// Kyderman's test location
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//var lat = 51.352085106718384;
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//var lng = -2.9877930879592896;
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// Toeler's test location
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var lat = -43.5261282;
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var lng = 172.6561085;
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var s2latlng = new S2.S2LatLng(lat, lng);
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var cellId = new S2.S2CellId(s2latlng).parent(15);
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var cell;
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var walk = [];
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var next = cellId;
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var prev = cellId;
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var i;
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// -10 - -1
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for (i = 0; i < 10; i += 1) {
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prev = prev.prev();
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walk.unshift([ -(i + 1), prev ]);
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}
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// 0
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walk.push([ 0, cellId ]);
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// 1 - 10
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for (i = 0; i < 10; i += 1) {
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next = next.next();
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walk.push([ i + 1, next ]);
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}
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// all results
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walk.forEach(function (parts) {
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var i = parts[0];
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var cellId = parts[1];
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cell = new S2.S2Cell(cellId);
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console.log(i, cell.face(), cellId.id(), cellId.toString(), cellId.toLatLng().toString(), cellId.level());
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});
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