switch to bbox search

app.py

@@ -14,27 +14,37 @@ if not MAPILLARY_ACCESS_TOKEN:
     st.error("Mapillary access token not found. Please configure it in the Space secrets.")
     st.stop()
 
-def get_nearest_image(lat, lon, radius=50):
+def get_bounding_box(lat, lon):
+    """
+    Create a bounding box around a point that extends roughly 25 meters in each direction
+    at Amsterdam's latitude (52.37°N):
+    - 0.000224 degrees latitude = 25 meters N/S
+    - 0.000368 degrees longitude = 25 meters E/W
+    """
+    lat_offset = 0.000224  # 25 meters in latitude
+    lon_offset = 0.000368  # 25 meters in longitude
+    return [
+        lon - lon_offset,  # min longitude
+        lat - lat_offset,  # min latitude
+        lon + lon_offset,  # max longitude
+        lat + lat_offset   # max latitude
+    ]
+
+def get_nearest_image(lat, lon):
     """
     Get the nearest Mapillary image to given coordinates
     """
+    bbox = get_bounding_box(lat, lon)
     params = {
         'fields': 'id,thumb_1024_url',
-        'limit': 1
+        'limit': 1,
+        'bbox': f'{bbox[0]},{bbox[1]},{bbox[2]},{bbox[3]}'
     }
-    
-    query = f"""
-    {{
-        "point": {{"type": "Point", "coordinates": [{lon}, {lat}]}},
-        "radius": {radius}
-    }}
-    """
-    
+
     header = {'Authorization' : 'OAuth {}'.format(MAPILLARY_ACCESS_TOKEN)}
     try:
-        response = requests.post(
-            "https://graph.mapillary.com/images/search",
-            json=query,
+        response = requests.get(
+            "https://graph.mapillary.com/images",
             params=params,
             headers=header
         )