|
import streamlit as st |
|
import geopandas as gpd |
|
import folium |
|
from streamlit_folium import folium_static, st_folium |
|
from folium.plugins import Draw |
|
import requests |
|
from shapely.geometry import box |
|
import json |
|
|
|
st.set_page_config(layout="wide", page_title="Extracteur de données géospatiales") |
|
|
|
SWISSTOPO_LAYERS = { |
|
"SWISSIMAGE 10 cm": {"id": "ch.swisstopo.swissimage-dop10", "source": "swisstopo", "type": "image"}, |
|
"Carte nationale 1:25'000": {"id": "ch.swisstopo.pixelkarte-farbe-pk25.noscale", "source": "swisstopo", "type": "image"}, |
|
"MNT": {"id": "ch.swisstopo.swissalti3d", "source": "swisstopo", "type": "raster"}, |
|
"Carte géologique": {"id": "ch.swisstopo.geologie-geologische_karte", "source": "swisstopo", "type": "image"}, |
|
"Limites administratives": {"id": "ch.swisstopo.swissboundaries3d-gemeinde-flaeche.fill", "source": "swisstopo", "type": "vector"}, |
|
"RĂ©seau hydrographique": {"id": "ch.bafu.vec25-gewaessernetz", "source": "swisstopo", "type": "vector"}, |
|
"swissBUILDINGS3D 3.0 Beta": {"id": "ch.swisstopo.swissbuildings3d_3_0", "source": "swisstopo", "type": "3d"}, |
|
} |
|
|
|
ESRI_LAYERS = { |
|
"World Imagery": {"id": "World_Imagery", "source": "esri", "type": "image"}, |
|
"World Elevation": {"id": "Elevation/World_Elevation", "source": "esri", "type": "raster"}, |
|
"World Topographic": {"id": "World_Topo_Map", "source": "esri", "type": "image"}, |
|
"World Street Map": {"id": "World_Street_Map", "source": "esri", "type": "image"}, |
|
"World Terrain": {"id": "World_Terrain_Base", "source": "esri", "type": "image"}, |
|
} |
|
|
|
def draw_box_on_map(): |
|
m = folium.Map(location=[46.8, 8.2], zoom_start=8) |
|
Draw(draw_options={'polyline': False, 'polygon': False, 'circle': False, 'marker': False, 'circlemarker': False}, |
|
edit_options={'edit': False}).add_to(m) |
|
return st_folium(m, width=700, height=500) |
|
|
|
def create_geojson_from_box(bbox): |
|
gdf = gpd.GeoDataFrame({'geometry': [bbox]}, crs="EPSG:4326") |
|
return json.loads(gdf.to_json()), json.loads(gdf.to_crs("EPSG:2056").to_json()) |
|
|
|
@st.cache_data |
|
def get_download_url(bbox, layer_info): |
|
if layer_info["source"] == "swisstopo": |
|
api_url = f"https://data.geo.admin.ch/api/stac/v0.9/collections/{layer_info['id']}/items" |
|
params = {"bbox": ",".join(map(str, bbox)), "limit": 1} |
|
response = requests.get(api_url, params=params) |
|
data = response.json() |
|
if data['features']: |
|
feature = data['features'][0] |
|
asset_keys = feature['assets'].keys() |
|
data_key = 'rgb' if 'rgb' in asset_keys else 'data' if 'data' in asset_keys else next(iter(asset_keys)) |
|
return feature['assets'][data_key]['href'] |
|
else: |
|
service_url = f"https://services.arcgisonline.com/arcgis/rest/services/{layer_info['id']}/MapServer/export" |
|
params = { |
|
"bbox": f"{bbox[0]},{bbox[1]},{bbox[2]},{bbox[3]}", |
|
"bboxSR": 4326, |
|
"size": "1000,1000", |
|
"format": "png", |
|
"f": "html", |
|
"imageSR": 4326, |
|
"transparent": "true" |
|
} |
|
return f"{service_url}?{'&'.join([f'{k}={v}' for k, v in params.items()])}" |
|
return None |
|
|
|
def main(): |
|
st.title("Extracteur de données Swisstopo et ESRI") |
|
|
|
col1, col2 = st.columns([1, 3]) |
|
|
|
with col1: |
|
st.subheader("SĂ©lection des couches") |
|
source = st.radio("Source des données", ["Swisstopo", "ESRI"]) |
|
|
|
layers = SWISSTOPO_LAYERS if source == "Swisstopo" else ESRI_LAYERS |
|
|
|
selected_layers = st.multiselect("Couches Ă extraire", list(layers.keys())) |
|
|
|
st.markdown("---") |
|
st.markdown("## à propos\nExtracteur de données géospatiales Swisstopo et ESRI.\nDéveloppé par Vertdure") |
|
|
|
with col2: |
|
st.subheader("1. DĂ©finir la zone d'intĂ©rĂȘt") |
|
method = st.radio("MĂ©thode", ["Dessiner", "GeoJSON"], horizontal=True) |
|
if method == "Dessiner": |
|
if 'bbox' not in st.session_state: |
|
map_data = draw_box_on_map() |
|
if map_data['last_active_drawing']: |
|
coords = map_data['last_active_drawing']['geometry']['coordinates'][0] |
|
bbox = box(min(c[0] for c in coords), min(c[1] for c in coords), |
|
max(c[0] for c in coords), max(c[1] for c in coords)) |
|
st.session_state['bbox'] = bbox |
|
st.session_state['geojson_wgs84'], st.session_state['geojson_swiss'] = create_geojson_from_box(bbox) |
|
st.success("Zone sélectionnée!") |
|
else: |
|
st.success("Zone déjà sélectionnée. Cliquez sur 'Effacer la zone' pour redessiner.") |
|
if st.button("Effacer la zone"): |
|
del st.session_state['bbox'] |
|
del st.session_state['geojson_wgs84'] |
|
del st.session_state['geojson_swiss'] |
|
st.experimental_rerun() |
|
else: |
|
uploaded_file = st.file_uploader("GeoJSON", type="geojson") |
|
if uploaded_file: |
|
gdf = gpd.read_file(uploaded_file) |
|
st.session_state['geojson_wgs84'] = json.loads(gdf.to_crs(4326).to_json()) |
|
st.session_state['geojson_swiss'] = json.loads(gdf.to_crs(2056).to_json()) |
|
st.success("GeoJSON chargé!") |
|
|
|
if st.button("Obtenir les liens de téléchargement"): |
|
if 'geojson_wgs84' not in st.session_state or 'geojson_swiss' not in st.session_state: |
|
st.error("DĂ©finissez d'abord une zone d'intĂ©rĂȘt.") |
|
elif not selected_layers: |
|
st.error("SĂ©lectionnez au moins une couche Ă extraire.") |
|
else: |
|
for layer_name in selected_layers: |
|
layer_info = layers[layer_name] |
|
bbox = gpd.GeoDataFrame.from_features(st.session_state['geojson_swiss' if layer_info["source"] == "swisstopo" else 'geojson_wgs84']).total_bounds |
|
st.write(f"Traitement de la couche : {layer_name}") |
|
st.write(f"Bbox : {bbox}") |
|
download_url = get_download_url(bbox, layer_info) |
|
if download_url: |
|
st.markdown(f"[Télécharger {layer_name}]({download_url})") |
|
else: |
|
st.error(f"Impossible d'obtenir le lien pour {layer_name}") |
|
|
|
if __name__ == "__main__": |
|
main() |