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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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import io |
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import rasterio |
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from rasterio.io import MemoryFile |
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import numpy as np |
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import os |
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st.set_page_config(layout="wide", page_title="Extracteur de données géospatiales") |
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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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"ESRI - World Imagery": {"id": "WorldImagery", "source": "esri", "type": "image"}, |
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"ESRI - World Elevation": {"id": "WorldElevation", "source": "esri", "type": "raster"} |
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} |
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def draw_box_on_map(): |
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"""Crée une carte interactive pour dessiner une zone d'intérêt.""" |
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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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"""Crée un GeoJSON à partir d'une boîte englobante.""" |
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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 extract_swisstopo_data(bbox, layer_id, layer_type): |
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"""Extrait les données de Swisstopo.""" |
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api_url = f"https://data.geo.admin.ch/api/stac/v0.9/collections/{layer_id}/items" |
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params = {"bbox": ",".join(map(str, bbox)), "limit": 1} |
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try: |
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response = requests.get(api_url, params=params) |
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response.raise_for_status() |
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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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data_url = feature['assets'][data_key]['href'] |
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return requests.get(data_url).content |
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except requests.RequestException as e: |
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st.error(f"Erreur Swisstopo: {str(e)}") |
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return None |
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@st.cache_data |
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def extract_esri_data(bbox, layer_id, layer_type): |
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"""Extrait les données d'ESRI.""" |
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service_url = "https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/export" if layer_type == "image" else "https://elevation.arcgis.com/arcgis/rest/services/WorldElevation/Terrain/ImageServer/exportImage" |
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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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"format": "tiff", |
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"f": "image", |
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"imageSR": 4326 |
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} |
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try: |
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response = requests.get(service_url, params=params) |
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response.raise_for_status() |
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return response.content |
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except requests.RequestException as e: |
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st.error(f"Erreur ESRI: {str(e)}") |
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return None |
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def process_and_save_data(data, layer_name, layer_type): |
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"""Traite et sauvegarde les données extraites.""" |
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if data is None: |
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st.warning(f"Pas de données pour {layer_name}") |
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return |
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try: |
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with MemoryFile(data) as memfile: |
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with memfile.open() as src: |
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output_folder = "extracted_data" |
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os.makedirs(output_folder, exist_ok=True) |
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output_filename = os.path.join(output_folder, f"{layer_name.lower().replace(' ', '_')}.tif") |
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profile = src.profile |
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if layer_type == "image" and src.count == 4: |
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profile.update(count=3) |
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with rasterio.open(output_filename, 'w', **profile) as dst: |
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if layer_type == "image" and src.count == 4: |
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dst.write(src.read()[0:3, :, :]) |
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else: |
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dst.write(src.read()) |
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st.success(f"Données sauvegardées : {output_filename}") |
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except Exception as e: |
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st.error(f"Erreur de traitement pour {layer_name}: {str(e)}") |
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def main(): |
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st.title("Extracteur de données Swisstopo et ESRI") |
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selected_layers = st.multiselect("Couches à extraire", list(LAYERS.keys())) |
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col1, col2 = st.columns([1, 3]) |
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with col1: |
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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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st.subheader("1. Définir la zone d'intérêt") |
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method = st.radio("Méthode", ["Dessiner", "GeoJSON"], horizontal=True) |
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if method == "Dessiner": |
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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['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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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("Extraire les données"): |
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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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with st.spinner("Extraction des données en cours..."): |
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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.info(f"Traitement de la couche : {layer_name}") |
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data = extract_swisstopo_data(bbox, layer_info["id"], layer_info["type"]) if layer_info["source"] == "swisstopo" else extract_esri_data(bbox, layer_info["id"], layer_info["type"]) |
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process_and_save_data(data, layer_name, layer_info["type"]) |
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st.success("Extraction terminée !") |
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if __name__ == "__main__": |
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main() |