tilebelt - npm Package Compare versions

Comparing version 0.4.0 to 0.5.0

index.js

		@@ -85,3 +85,3 @@ // a tile is an array [x,y,z]
		tile1[1] === tile2[1] &&
		tile1[2] === tile2[2]
		tile1[2] === tile2[2];
		);
		@@ -130,3 +130,26 @@ }

		function bboxToTile(bboxCoords) {
		var min = pointToTile(bboxCoords[0], bboxCoords[1], 32);
		var max = pointToTile(bboxCoords[2], bboxCoords[3], 32);
		var bbox = [min[0], min[1], max[0], max[1]];

		var z = getBboxZoom(bbox);
		var x = bbox[0] >> (32 - z);
		var y = bbox[1] >> (32 - z);
		return [x,y,z];
		}

		function getBboxZoom(bbox) {
		var MAX_ZOOM = 28;
		for (var z = 0; z < MAX_ZOOM; z++) {
		var mask = 1 << (32 - (z + 1));
		if (((bbox[0] & mask) != (bbox[2] & mask)) \|\|
		((bbox[1] & mask) != (bbox[3] & mask))) {
		return z;
		}
		}

		return MAX_ZOOM;
		}

		module.exports = {
		@@ -143,3 +166,4 @@ tileToGeoJSON: tileToGeoJSON,
		quadkeyToTile: quadkeyToTile,
		pointToTile: pointToTile
		pointToTile: pointToTile,
		bboxToTile: bboxToTile
		};

package.json

		{
		"name": "tilebelt",
		"version": "0.4.0",
		"version": "0.5.0",
		"description": "simple tile utilities",
		@@ -5,0 +5,0 @@ "main": "index.js",

test.js

		@@ -94,2 +94,12 @@ var test = require('tape'),

		test('point to tile verified', function(t) {
		var tile = tilebelt.pointToTile(-77.03239381313323,38.91326516559442,10);
		t.equal(tile.length, 3);
		t.equal(tile[0], 292);
		t.equal(tile[1], 391);
		t.equal(tile[2], 10);
		t.equal(tilebelt.tileToQuadkey(tile), '0320100322')
		t.end();
		});

		test('point and tile back and forth', function(t) {
		@@ -102,5 +112,32 @@ var tile = tilebelt.pointToTile(10,10,10);
		test('check key 03', function(t) {
		var quadkey = '03'
		t.equal(tilebelt.quadkeyToTile(quadkey).toString(), [1,1,2].toString())
		var quadkey = '03';
		t.equal(tilebelt.quadkeyToTile(quadkey).toString(), [1,1,2].toString());
		t.end();
		});

		test('bbox to tile -- big', function(t) {
		var bbox = [-84.72656249999999,
		11.178401873711785,
		-5.625,
		61.60639637138628];
		var tile = tilebelt.bboxToTile(bbox)
		t.ok(tile, 'convert bbox to tile');
		t.equal(tile[0], 1);
		t.equal(tile[1], 1);
		t.equal(tile[2], 2);
		t.end();

		})

		test('bbox to tile -- dc', function(t) {
		var bbox = [-77.04615354537964,
		38.899967510782346,
		-77.03664779663086,
		38.90728142481329];
		var tile = tilebelt.bboxToTile(bbox);
		t.ok(tile, 'convert bbox to tile');
		t.equal(tile[0], 9371);
		t.equal(tile[1], 12534);
		t.equal(tile[2], 15);
		t.end();
		});

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