- fixes winding of GeoJSON to follow right-hand rule (#38)

mapbox · Sep 10, 2020 · aa4c1aa · aa4c1aa
1 parent 7df684f
commit aa4c1aa
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/index.js b/index.js
@@ -36,11 +36,11 @@ function tileToGeoJSON(tile) {
     var poly = {
         type: 'Polygon',
         coordinates: [[
-            [bbox[0], bbox[1]],
             [bbox[0], bbox[3]],
-            [bbox[2], bbox[3]],
+            [bbox[0], bbox[1]],
             [bbox[2], bbox[1]],
-            [bbox[0], bbox[1]]
+            [bbox[2], bbox[3]],
+            [bbox[0], bbox[3]]
         ]]
     };
     return poly;

diff --git a/test.js b/test.js
@@ -9,6 +9,13 @@ test('tile to geojson', function (t) {
     var geojson = tilebelt.tileToGeoJSON(tile1);
     t.ok(geojson, 'get geojson representation of tile');
     t.equal(geojson.type, 'Polygon');
+    t.deepEqual(geojson.coordinates, [[
+        [-178.2421875, 84.73838712095339],
+        [-178.2421875, 84.7060489350415],
+        [-177.890625, 84.7060489350415],
+        [-177.890625, 84.73838712095339],
+        [-178.2421875, 84.73838712095339]
+    ]], 'Coordinates');
     t.end();
 });