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import streamlit as st |
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import geopandas as gpd |
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import folium |
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from streamlit_folium import folium_static, st_folium |
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from folium.plugins import Draw |
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import requests |
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from shapely.geometry import box |
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import json |
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st.set_page_config(layout="wide", page_title="Extracteur de données géospatiales") |
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ESRI_SERVICES = { |
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'World_Imagery' : 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer', |
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'World_Topo_Map' : 'https://services.arcgisonline.com/arcgis/rest/services/World_Topo_Map/MapServer', |
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'World_Shaded_Relief' : 'https://services.arcgisonline.com/arcgis/rest/services/World_Shaded_Relief/MapServer', |
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'World_Terrain_Base' : 'https://services.arcgisonline.com/arcgis/rest/services/World_Terrain_Base/MapServer', |
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'World_Street_Map' : 'https://services.arcgisonline.com/arcgis/rest/services/World_Street_Map/MapServer', |
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'World_Elevation' : 'https://elevation.arcgis.com/arcgis/rest/services/WorldElevation/Terrain/ImageServer', |
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} |
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ESRI_FORMATS = { |
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'png' : 'png', |
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'png8' : 'png8', |
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'png24' : 'png24', |
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'png32' : 'png32', |
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'jpg' : 'jpg', |
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'tiff' : 'tiff', |
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} |
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LAYERS = { |
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"Swisstopo - SWISSIMAGE 10 cm": {"id": "ch.swisstopo.swissimage-dop10", "source": "swisstopo", "type": "image"}, |
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"Swisstopo - Carte nationale 1:25'000": {"id": "ch.swisstopo.pixelkarte-farbe-pk25.noscale", "source": "swisstopo", "type": "image"}, |
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"Swisstopo - MNT": {"id": "ch.swisstopo.swissalti3d", "source": "swisstopo", "type": "raster"}, |
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"Swisstopo - Carte géologique": {"id": "ch.swisstopo.geologie-geologische_karte", "source": "swisstopo", "type": "image"}, |
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"Swisstopo - Limites administratives": {"id": "ch.swisstopo.swissboundaries3d-gemeinde-flaeche.fill", "source": "swisstopo", "type": "vector"}, |
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"Swisstopo - Réseau hydrographique": {"id": "ch.bafu.vec25-gewaessernetz", "source": "swisstopo", "type": "vector"}, |
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"Swisstopo - swissBUILDINGS3D 3.0 Beta": {"id": "ch.swisstopo.swissbuildings3d_3_0", "source": "swisstopo", "type": "3d"}, |
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"ESRI - World Imagery": {"id": "World_Imagery", "source": "esri", "type": "image"}, |
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"ESRI - World Elevation": {"id": "World_Elevation", "source": "esri", "type": "raster"}, |
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"ESRI - World Topographic": {"id": "World_Topo_Map", "source": "esri", "type": "image"}, |
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"ESRI - World Street Map": {"id": "World_Street_Map", "source": "esri", "type": "image"}, |
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"ESRI - World Terrain": {"id": "World_Terrain_Base", "source": "esri", "type": "image"}, |
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} |
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def draw_box_on_map(): |
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m = folium.Map(location=[46.8, 8.2], zoom_start=8) |
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Draw(draw_options={'polyline': False, 'polygon': False, 'circle': False, 'marker': False, 'circlemarker': False}, |
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edit_options={'edit': False}).add_to(m) |
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return st_folium(m, width=700, height=500) |
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def create_geojson_from_box(bbox): |
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gdf = gpd.GeoDataFrame({'geometry': [bbox]}, crs="EPSG:4326") |
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return json.loads(gdf.to_json()), json.loads(gdf.to_crs("EPSG:2056").to_json()) |
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@st.cache_data |
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def get_download_url(bbox, layer_info): |
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if layer_info["source"] == "swisstopo": |
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return get_swisstopo_url(bbox, layer_info) |
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else: |
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return get_esri_url(bbox, layer_info) |
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def get_swisstopo_url(bbox, layer_info): |
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api_url = f"https://data.geo.admin.ch/api/stac/v0.9/collections/{layer_info['id']}/items" |
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params = {"bbox": ",".join(map(str, bbox)), "limit": 1} |
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response = requests.get(api_url, params=params) |
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data = response.json() |
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if data['features']: |
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feature = data['features'][0] |
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asset_keys = feature['assets'].keys() |
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data_key = 'rgb' if 'rgb' in asset_keys else 'data' if 'data' in asset_keys else next(iter(asset_keys)) |
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return feature['assets'][data_key]['href'] |
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return None |
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def get_esri_url(bbox, layer_info): |
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service_url = ESRI_SERVICES.get(layer_info["id"]) |
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if not service_url: |
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return None |
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if layer_info["type"] == "image": |
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return get_esri_image_url(bbox, service_url) |
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elif layer_info["type"] == "raster": |
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return get_esri_terrain_url(bbox, service_url) |
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return None |
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def get_esri_image_url(bbox, service_url): |
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params = { |
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'bbox': f'{bbox[0]},{bbox[1]},{bbox[2]},{bbox[3]}', |
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'bboxSR': 4326, |
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'size': '1000,1000', |
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'imageSR': 3857, |
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'format': ESRI_FORMATS['png'], |
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'f': 'json' |
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} |
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response = requests.get(f"{service_url}/export", params=params) |
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if response.status_code == 200: |
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result = response.json() |
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if 'href' in result: |
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return result['href'] |
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return None |
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def get_esri_terrain_url(bbox, service_url): |
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params = { |
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'bbox': f'{bbox[0]},{bbox[1]},{bbox[2]},{bbox[3]}', |
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'bboxSR': 4326, |
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'size': '1000,1000', |
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'imageSR': 3857, |
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'format': ESRI_FORMATS['tiff'], |
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'pixelType': 'F32', |
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'noDataInterpretation': 'esriNoDataMatchAny', |
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'interpolation': '+RSP_BilinearInterpolation', |
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'f': 'json' |
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} |
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response = requests.get(f"{service_url}/exportImage", params=params) |
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if response.status_code == 200: |
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result = response.json() |
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if 'href' in result: |
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return result['href'] |
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return None |
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def main(): |
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st.title("Extracteur de données Swisstopo et ESRI") |
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col1, col2 = st.columns([1, 2]) |
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with col1: |
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st.subheader("Sélection des couches") |
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selected_layers = st.multiselect("Couches à extraire", list(LAYERS.keys())) |
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st.subheader("Définir la zone d'intérêt") |
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method = st.radio("Méthode", ["Dessiner", "GeoJSON"], horizontal=True) |
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if method == "GeoJSON": |
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uploaded_file = st.file_uploader("GeoJSON", type="geojson") |
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if uploaded_file: |
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gdf = gpd.read_file(uploaded_file) |
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st.session_state['geojson_wgs84'] = json.loads(gdf.to_crs(4326).to_json()) |
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st.session_state['geojson_swiss'] = json.loads(gdf.to_crs(2056).to_json()) |
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st.success("GeoJSON chargé!") |
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if st.button("Obtenir les liens de téléchargement"): |
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if 'geojson_wgs84' not in st.session_state or 'geojson_swiss' not in st.session_state: |
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st.error("Définissez d'abord une zone d'intérêt.") |
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elif not selected_layers: |
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st.error("Sélectionnez au moins une couche à extraire.") |
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else: |
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for layer_name in selected_layers: |
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layer_info = LAYERS[layer_name] |
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bbox = gpd.GeoDataFrame.from_features(st.session_state['geojson_swiss' if layer_info["source"] == "swisstopo" else 'geojson_wgs84']).total_bounds |
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st.write(f"Traitement de la couche : {layer_name}") |
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st.write(f"Bbox : {bbox}") |
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download_url = get_download_url(bbox, layer_info) |
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if download_url: |
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st.markdown(f"[Télécharger {layer_name}]({download_url})") |
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else: |
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st.error(f"Impossible d'obtenir le lien pour {layer_name}") |
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st.markdown("---") |
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st.markdown("## À propos\nExtracteur de données géospatiales Swisstopo et ESRI.\nDéveloppé par Vertdure") |
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with col2: |
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if 'bbox' not in st.session_state: |
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map_data = draw_box_on_map() |
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if map_data['last_active_drawing']: |
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coords = map_data['last_active_drawing']['geometry']['coordinates'][0] |
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bbox = box(min(c[0] for c in coords), min(c[1] for c in coords), |
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max(c[0] for c in coords), max(c[1] for c in coords)) |
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st.session_state['bbox'] = bbox |
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st.session_state['geojson_wgs84'], st.session_state['geojson_swiss'] = create_geojson_from_box(bbox) |
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st.success("Zone sélectionnée!") |
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else: |
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st.success("Zone déjà sélectionnée. Utilisez le bouton ci-dessous pour redessiner.") |
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if st.button("Redessiner la zone"): |
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del st.session_state['bbox'] |
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del st.session_state['geojson_wgs84'] |
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del st.session_state['geojson_swiss'] |
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st.experimental_rerun() |
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else: |
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m = folium.Map(location=[46.8, 8.2], zoom_start=8) |
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folium.GeoJson(st.session_state['geojson_wgs84']).add_to(m) |
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st_folium(m, width=700, height=500) |
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if __name__ == "__main__": |
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main() |
