Update GeoJSON

1 files changed, 59 insertions, 6 deletions

diff --git a/dashboard/templates/index.html b/dashboard/templates/index.html
index 229405c..0d233fd 100644
--- a/dashboard/templates/index.html
+++ b/dashboard/templates/index.html
@@ -76,7 +76,7 @@
 <script type="text/javascript">
     var map;
     InitializeMap({
-        city: "Buffalo, NY",
+        city: "Buffalo",
         latitude: 42.8864,
         longitude: -78.8784
     });
@@ -94,13 +94,13 @@
     });
 
     function InitializeMap(city) {
-        map = L.map('map').setView([city.latitude, city.longitude], 14);
+        map = L.map('map').setView([city.latitude, city.longitude], 12);
         displayMap(map, city);
     }
 
     function reRenderMap(city) {
         map.remove();
-        map = L.map('map').setView([city.latitude, city.longitude], 14);
+        map = L.map('map').setView([city.latitude, city.longitude], 12);
         displayMap(map, city);
     }
 
@@ -108,9 +108,62 @@
         L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
             accessToken: 'pk.eyJ1IjoibHVjaWZlcmNyIiwiYSI6ImNrNGx0amIzejJkaHIzZm8yODB2dGx2cXYifQ.sopB-tKzpX_qXc30bv_puQ'
         }).addTo(map);
-        L.marker([city.latitude, city.longitude]).addTo(map)
-        .bindPopup(city.city)
-        .openPopup();
+        getBoundaries(city.city).then(function (bd) {
+            var lines = [];
+            for (var element of bd) {
+                const extractedBoundary = {
+                    type: 'Feature',
+                    properties: {
+                        name: city.city
+                    },
+                    geometry: {
+                        type: "Polygon",
+                        coordinates: element.boundaries.coordinates
+                    }
+                }
+                lines.push(extractedBoundary);
+            }
+
+            var geoJSON = {
+                type: 'FeatureCollection',
+                features: lines
+            };
+
+            var gs = L.geoJSON(geoJSON).addTo(map);
+            try {
+                map.fitBounds(gs.getBounds());
+            } catch (e) {
+                L.marker([city.latitude, city.longitude]).addTo(map)
+                    .bindPopup(city.city)
+                    .openPopup();
+            }
+        })
+    }
+
+    function getBoundaries(city) {
+        geojson = [];
+
+        return fetch(`https://nominatim.openstreetmap.org/search.php?q=${city}&polygon_geojson=1&format=jsonv2`).then(function (response) {
+            return response.json();
+        }).then(function (data) {
+            counter = 0;
+
+            for (var el of data) {
+                if (el.type === "administrative") {
+                    geojson.push({ boundaries: el.geojson, name: el.display_name });
+                    counter += 1;
+                }
+
+                if (counter === 1 && !el.display_name.includes("Rural")) {
+                    break;
+                } else if (counter === 2 && el.display_name.includes("Rural")) {
+                    break;
+                }
+            }
+            return geojson;
+        }).catch(function () {
+            return false;
+        });
     }
 </script>