add: cloro-map to map widget, not working

app/lib/pages/widgets/cloropleth_map.dart

 import 'dart:convert';
-
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 import 'package:syncfusion_flutter_maps/maps.dart';
 
+
+class ChoroplethMap extends StatefulWidget {
+  @override
+  _ChoroplethMapState createState() => _ChoroplethMapState();
+}
+
 class _ChoroplethMapState extends State {
   late MapShapeSource mapShapeSource;
 
@@ -12,11 +17,14 @@ class _ChoroplethMapState extends State {
     super.initState();
     getRelation().then((geojsonData) {
       setState(() {
-        mapShapeSource = MapShapeSource.geoJson(
-          geojsonData,
-          shapeDataField: 'features',
-          primaryValueMapper: (Map<String, dynamic> shapeData) {
-            return shapeData['Mjøsa'];
+        final geoJsonData = json.decode(geojsonData);
+
+        mapShapeSource = MapShapeSource.asset(
+          geoJsonData,
+          shapeDataField: 'coordinates',
+          dataCount: geoJsonData.length,
+          primaryValueMapper: (int index) {
+            return 'lake'; // NB: temp hardcoded value, no subdivisions yet
           },
         );
       });
@@ -30,23 +38,25 @@ class _ChoroplethMapState extends State {
     return SfMaps(
       layers: [
         MapShapeLayer(
-        source: mapShapeSource,
-        strokeColor: Colors.white30,
-        legend: const MapLegend.bar(MapElement.shape,
+          source: mapShapeSource,
+          strokeColor: Colors.white30,
+          legend: const MapLegend.bar(
+            MapElement.shape,
             position: MapLegendPosition.bottom,
-            segmentSize: Size(55.0, 9.0)
-        )
+            segmentSize: Size(55.0, 9.0),
+          ),
         ),
       ],
     );
   }
 
+  // getRelation requests the polygon coordinates from the server
   Future<String> getRelation() async {
     final response = await http.get(Uri.parse('get_relation'));
     if (response.statusCode == 200) {
       return response.body;
     } else {
-      throw Exception('Failed to retrieve geojson data');
+      throw Exception('Failed to retrieve geojson data from server. Status code: ${response.statusCode}');
     }
   }
 }

app/lib/pages/widgets/map_widget.dart

@@ -6,6 +6,7 @@ import 'stat_charts.dart';
 import 'sat_layer.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'interactive_polygon.dart';
+import 'cloropleth_map.dart';
 import 'package:latlong2/latlong.dart' as latLng;
 
 
@@ -59,7 +60,8 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
                   SizedBox(
                     width: screenWidth * boxWidth,
                     height: screenWidth * boxHeight,
-                    child: FlutterMap(
+                    child: ChoroplethMap()
+                    /*FlutterMap(
                       options: MapOptions(
                         center: mapCenter,
                         zoom: 9.0,
@@ -102,7 +104,7 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
                           }).toList(),
                         ),
                       ],
-                    ),
+                    ),*/
                   ),
                   /*SizedBox(
                     width: screenWidth * boxWidth,

app/pubspec.yaml

 name: app
-description: "A new Flutter project."
+description: "IceMap Application"
 publish_to: 'none'
 version: 0.1.0
 

server/map/get_relation.py

@@ -8,17 +8,8 @@ def get_relation(self, body_of_water: string):
     with open("server/map/" + body_of_water.lower() + ".geojson") as f:
         data = json.load(f)
 
-    # Extracting coordinates from the GeoJSON features
-    coordinates = []
-    for feature in data['features']:
-        if feature['geometry']['type'] == 'Polygon':
-            coordinates.extend(feature['geometry']['coordinates'][0])
-        elif feature['geometry']['type'] == 'MultiPolygon':
-            for polygon_coords in feature['geometry']['coordinates']:
-                coordinates.extend(polygon_coords[0])
-
-    # Convert response data to JSON string
-    response_json = json.dumps(coordinates)
+    # Convert data to JSON string
+    response_json = json.dumps(data)
 
     # Set headers
     self.send_response(200)