test app

app.py

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+import streamlit as st
+import folium
+from streamlit_folium import st_folium
+import requests
+from PIL import Image
+from io import BytesIO
+import os
+
+# Securely get the token from environment variables
+MAPILLARY_ACCESS_TOKEN = os.environ.get('MAPILLARY_ACCESS_TOKEN')
+
+# Verify token exists
+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):
+    """
+    Get the nearest Mapillary image to given coordinates
+    """
+    params = {
+        'access_token': MAPILLARY_ACCESS_TOKEN,
+        'fields': 'id,thumb_1024_url',
+        'limit': 1
+    }
+    
+    query = f"""
+    {{
+        "point": {{"type": "Point", "coordinates": [{lon}, {lat}]}},
+        "radius": {radius}
+    }}
+    """
+    
+    try:
+        response = requests.post(
+            "https://graph.mapillary.com/images/search",
+            json=query,
+            params=params
+        )
+        response.raise_for_status()
+        data = response.json()
+        
+        if 'data' in data and len(data['data']) > 0:
+            return data['data'][0]
+        return None
+        
+    except requests.exceptions.RequestException as e:
+        st.error(f"Error fetching Mapillary data: {str(e)}")
+        return None
+
+def main():
+    st.title("Amsterdam Street View Explorer")
+    
+    # Initialize the map centered on Amsterdam
+    amsterdam_coords = [52.3676, 4.9041]
+    m = folium.Map(location=amsterdam_coords, zoom_start=13)
+    
+    # Add a marker for Amsterdam city center
+    folium.Marker(
+        amsterdam_coords,
+        popup="Amsterdam City Center",
+        icon=folium.Icon(color="red", icon="info-sign")
+    ).add_to(m)
+    
+    # Display the map and get clicked coordinates
+    map_data = st_folium(m, height=400, width=700)
+    
+    # Check if a location was clicked
+    if map_data['last_clicked']:
+        lat = map_data['last_clicked']['lat']
+        lng = map_data['last_clicked']['lng']
+        
+        st.write(f"Selected coordinates: {lat:.4f}, {lng:.4f}")
+        
+        # Get nearest Mapillary image
+        with st.spinner('Fetching street view image...'):
+            image_data = get_nearest_image(lat, lng)
+            
+            if image_data:
+                # Display the image
+                try:
+                    response = requests.get(image_data['thumb_1024_url'])
+                    image = Image.open(BytesIO(response.content))
+                    st.image(image, caption="Street View", use_column_width=True)
+                    
+                    # Add download button
+                    st.download_button(
+                        label="Download Image",
+                        data=response.content,
+                        file_name=f"streetview_{lat}_{lng}.jpg",
+                        mime="image/jpeg"
+                    )
+                    
+                except Exception as e:
+                    st.error(f"Error displaying image: {str(e)}")
+            else:
+                st.warning("No street view images found at this location. Try a different spot.")
+
+if __name__ == "__main__":
+    main()