Support node 4.x

tnchecktile.js

@@ -12,46 +12,46 @@ const merc = new SphericalMercator({
 });
 const ds = gdal.open('thailand_polygon.geojson');
 
-let driver = ds.driver;
-let driver_metadata = driver.getMetadata();
+var driver = ds.driver;
+var driver_metadata = driver.getMetadata();
 console.log('Driver: ' + driver.description);
 console.log('');
 
-let layerThailand = ds.layers.get(0);
-let extent = layerThailand.getExtent();
-let geoThailand = layerThailand.features.first().getGeometry();
+var layerThailand = ds.layers.get(0);
+var extent = layerThailand.getExtent();
+var geoThailand = layerThailand.features.first().getGeometry();
 if(geoThailand){
     //console.log('Have Geo');
     const filename = 'tile_info.sqlite';
     fs.unlink(filename);
     sqlite.connect(filename); 
     sqlite.run('CREATE TABLE tiles (zoom_level integer, tile_column integer, tile_row integer, tile_status integer)');
-    let minzoom = 1;
-    let maxzoom = 10;
-    let row = 0;
-    let totalRecord = 0;
-    for(let z = minzoom; z <= maxzoom; z++){
-        let nw = [extent.minX,extent.maxY];
-        let se = [extent.maxX,extent.minY];
-        let minTileX = long2tile(nw[0],z);
-        let minTileY = lat2tile(nw[1],z);
-        let maxTileX = long2tile(se[0],z);
-        let maxTileY = lat2tile(se[1],z);
-        let total = (maxTileX-minTileX)*(maxTileY-minTileY);
+    var minzoom = 1;
+    var maxzoom = 10;
+    var row = 0;
+    var totalRecord = 0;
+    for(var z = minzoom; z <= maxzoom; z++){
+        var nw = [extent.minX,extent.maxY];
+        var se = [extent.maxX,extent.minY];
+        var minTileX = long2tile(nw[0],z);
+        var minTileY = lat2tile(nw[1],z);
+        var maxTileX = long2tile(se[0],z);
+        var maxTileY = lat2tile(se[1],z);
+        var total = (maxTileX-minTileX)*(maxTileY-minTileY);
         totalRecord+=total;
 
         console.log('Zoom:'+z+' Size: '+total+' Sum: '+totalRecord);
         //continue;
-        for(let y = minTileY; y <= maxTileY ; y++){
-            for(let x = minTileX; x <= maxTileX ;x++){
-                let box = merc.bbox(x,y,z);
-                let minx = box[0];
-                let miny = box[1];
-                let maxx = box[2];
-                let maxy = box[3];
-                let wkt = 'POLYGON(('+minx+' '+maxy+','+maxx+' '+maxy+','+maxx+' '+miny+','+minx+' '+miny+','+minx+' '+maxy+'))';
-                let geometry = gdal.Geometry.fromWKT(wkt);
-                let status = 0;
+        for(var y = minTileY; y <= maxTileY ; y++){
+            for(var x = minTileX; x <= maxTileX ;x++){
+                var box = merc.bbox(x,y,z);
+                var minx = box[0];
+                var miny = box[1];
+                var maxx = box[2];
+                var maxy = box[3];
+                var wkt = 'POLYGON(('+minx+' '+maxy+','+maxx+' '+maxy+','+maxx+' '+miny+','+minx+' '+miny+','+minx+' '+maxy+'))';
+                var geometry = gdal.Geometry.fromWKT(wkt);
+                var status = 0;
                 if(geoThailand.contains(geometry)){
                     //console.log('Contain : '+z+','+x+','+y);
                     status = 1;