fix: map return json structure, maybe

server/map/get_relation.py

 import geopandas as gpd
 from shapely.geometry import Polygon, LineString, MultiLineString
 from shapely.ops import linemerge, unary_union, polygonize
+import matplotlib.pyplot as plt
+import random
 import json
 import os
 
@@ -30,31 +32,47 @@ def get_relation(self, body_of_water: str):  # NB: implement body_of_water
 
         divided_map.extend(combine_grid_with_poly(polygon, lines))
 
+    ####################### PLOTTIND ############################
     tiles = [gpd.GeoDataFrame(geometry=[tile]) for tile in divided_map]
 
-    sub_div_id = 0
-    for tile in tiles:
-        tile['sub_div_id'] = sub_div_id
-        tile['sub_div_center'] = tile['geometry'].centroid.apply(lambda x: [x.x, x.y])
-        sub_div_id += 1
+    print("Plotting... This may take some time...")
+    # NB test plot
+    fig, ax = plt.subplots()
+    ax.set_aspect(1.5)
 
-    tiles_json = {'type': 'FeatureCollection', 'features': []}
+    # Plot each tile
     for tile in tiles:
-        feature = {
+        random_color = "#{:06x}".format(random.randint(0, 0xFFFFFF))
+        gpd.GeoSeries(tile.geometry).plot(ax=ax, facecolor=random_color, edgecolor='none')
+
+    plt.show()
+    ##################### PLOTTIND END ###########################
+
+    features = []
+
+    sub_div_id = 0
+    for tile in divided_map:
+        tile_feature = {
             'type': 'Feature',
-            'geometry': tile.geometry.__geo_interface__,
+            'geometry': tile.__geo_interface__,
             'properties': {
-                'sub_div_id': int(tile['sub_div_id'].iloc[0]),
-                'sub_div_center': tile['sub_div_center'].tolist()
+                'sub_div_id': sub_div_id,
+                'sub_div_center': tile.centroid.coords[0]
             }
         }
-        tiles_json['features'].append(feature)
+        features.append(tile_feature)
+        sub_div_id += 1
+
+    feature_collection = {
+        'type': 'FeatureCollection',
+        'features': features
+    }
 
     self.send_response(200)
     self.send_header("Content-type", "application/json")
     self.end_headers()
 
-    self.wfile.write(json.dumps(tiles_json).encode('utf-8'))
+    self.wfile.write(json.dumps(feature_collection).encode('utf-8'))
 
 
 def create_grid(poly: Polygon, cell_size):