Overhaul import logic and stop using projected coordinates

examples/import.html

@@ -110,17 +110,38 @@
 
       async function importPolygon(e) {
         let polygon = e.features[0];
+        // Uncomment to regenerate southwark.bin
+        /*let polygon = {
+          type: "Feature",
+          geometry: {
+            type: "Polygon",
+            coordinates: [
+              [
+                [-0.113371, 51.474014],
+                [-0.113371, 51.500307],
+                [-0.071072, 51.500307],
+                [-0.071072, 51.474014],
+                [-0.113371, 51.474014],
+              ],
+            ],
+          },
+        };*/
         draw.deleteAll();
         let status = document.getElementById("status");
 
-        status.textContent = "Fetching from Overpass";
-        let resp = await fetch(overpassQueryForPolygon(polygon));
-        let osmXml = await resp.text();
-
-        status.textContent = `Importing OSM data (${osmXml.length} bytes) with osm2streets`;
-        let bytes = convert(osmXml, JSON.stringify(polygon));
-        status.textContent = `Graph file (${bytes.length} bytes) done, downloading`;
-        downloadGeneratedFile(bytes, "route-snapper-graph.bin");
+        try {
+          status.textContent = "Fetching from Overpass";
+          let resp = await fetch(overpassQueryForPolygon(polygon));
+          let osmXml = await resp.arrayBuffer();
+
+          status.textContent = `Importing OSM data (${osmXml.length} bytes)`;
+          let bytes = convert(new Uint8Array(osmXml), JSON.stringify(polygon));
+          status.textContent = `Graph file (${bytes.length} bytes) done, downloading`;
+          downloadGeneratedFile(bytes, "route-snapper-graph.bin");
+        } catch (err) {
+          status.textContent = `Error: ${err}`;
+          window.alert(`Error: ${err}`);
+        }
       }
 
       // Construct a query to extract all XML data in the polygon clip. See

examples/osm-to-route-snapper

@@ -1 +1 @@
-../osm-to-route-snapper/
+../osm-to-route-snapper