fix: sucessfull map division

server/lake_relations/overpass_query.txt

-The following query
-
+The following query
\ No newline at end of file
-[out:json];
-(
-  way["natural"="water"]["name"="lakeName"];
-  relation["natural"="water"]["name"="lakeName"];
-);
-/*added by auto repair*/
-(._;>;);
-/*end of auto repair*/
-out body;

server/map/get_relation.py

@@ -10,14 +10,29 @@ polygon_min_x = None  # The left most point of the entire polygon
 
 # Read a json file with relation data and send to response object
 def get_relation(self, body_of_water: str):  # NB: implement body_of_water
-    divided_map = []  # List to store map shapes while splitting
 
-    # NB: test polygon, remove after testing
-    polygons = [circle_polygon()]
+    # Load GeoJSON data using geopandas
+    geo_data = gpd.read_file("server/map/mjosa.geojson")
+
+    # Filter only polygons, exclude points and other feature types to reduce response size
+    polygon_data = geo_data[geo_data['geometry'].geom_type == 'Polygon']
+
+    # Extract coordinates from polygons and create polygon objects
+    polygons = [Polygon(polygon.exterior) for polygon in polygon_data['geometry']]
+
+    if len(polygons) <= 1:  # Return if conversion to polygon fails
+        print("Failed to convert to polygons")
+        return
 
+    divided_map = []  # List to store map shapes while splitting
+    polygon_counter = 1
+    num_of_polygons = len(polygons)
+
+    print("Dividing map... This may take a few minutes. As reference, "
+          "a cell size of 0.01 takes approximately 13 minutes")
     # Divide all polygons into sections
     for polygon in polygons:
-        cell_size = 1
+        cell_size = 0.04  # NB smaller values require patience
         # Divide the length and with of polygon into a grid of equally sized parts
         lines = create_grid(polygon, cell_size)
 
@@ -28,18 +43,24 @@ def get_relation(self, body_of_water: str):  # NB: implement body_of_water
 
         divided_map = combine_gird_with_poly(polygon, lines)
 
+        print("Polygon nr.", polygon_counter, " finished processing. ", num_of_polygons-polygon_counter,
+              " polygons left to process.")
+        polygon_counter += 1
+
+        break
+
     tiles = gpd.GeoDataFrame(geometry=divided_map)
 
     # NB test plot
     fig, ax = plt.subplots()
-    ax.set_aspect(1)
+    ax.set_aspect(1.5)
 
     # Plot the divided_map
     tiles.plot(ax=ax, facecolor='none', edgecolor='black')
 
     for i, tile in enumerate(tiles.geometry):
         random_color = "#{:06x}".format(random.randint(0, 0xFFFFFF))
-        gpd.GeoSeries(tile).plot(ax=ax, facecolor=random_color, edgecolor='black')
+        gpd.GeoSeries(tile).plot(ax=ax, facecolor=random_color, edgecolor='none')
 
     plt.show()
 
@@ -54,24 +75,6 @@ def get_relation(self, body_of_water: str):  # NB: implement body_of_water
     # Write GeoJSON to response object
     self.wfile.write(tiles_json.encode('utf-8'))
 
-
-# NB: only for testing
-def circle_polygon():
-    circle_points = []
-    num_points = 500
-    center_x, center_y = 0.0, 0.0
-    radius = 6
-
-    for i in range(num_points):
-        angle = 2 * np.pi * i / num_points
-        x = center_x + radius * np.cos(angle)
-        y = center_y + radius * np.sin(angle)
-        circle_points.append((x, y))
-    circle_points.append(circle_points[0])  # Close the circle
-
-    return Polygon(circle_points)
-
-
 def create_grid(poly: Polygon, cell_size):
     # Retrieve bounds of the entire polygon
     bounds = poly.bounds