""" Visualize a single facility with its upstream/downstream river split. Uses pre-generated river_data files with polygon WKB stored per facility. """ import geopandas as gpd import folium from folium.plugins import AntPath from pathlib import Path import sys from shapely import wkb UPSTREAM_COLOR = "#2ca02c" # Green DOWNSTREAM_COLOR = "#d62728" # Red UPSTREAM_POLY_COLOR = "#98df8a" DOWNSTREAM_POLY_COLOR = "#ff9896" def create_facility_map(facility_name: str, output_path: Path): """Create a map focused on a single facility showing upstream/downstream split.""" base_dir = Path(__file__).resolve().parent # Load pre-generated facility data print(f"Loading data...") facilities_path = base_dir / "river_data_facilities.geoparquet" facilities = gpd.read_parquet(facilities_path) print(f"Loaded {len(facilities):,} facilities") # Find facility facility_matches = facilities[facilities['facilityName'].str.contains(facility_name, case=False, na=False)] if len(facility_matches) == 0: print(f"Facility '{facility_name}' not found!") return facility = facility_matches.iloc[0] print(f"Found: {facility['facilityName']} in {facility['city']}") print(f" Closest river: {facility['closest_river_id']} ({facility['distance_to_river_m']:.0f}m away)") print(f" Upstream: {facility['n_upstream']} parts") print(f" Downstream: {facility['n_downstream']} parts") # Parse geometries from WKB upstream_line_geom = None downstream_line_geom = None upstream_poly_geom = None downstream_poly_geom = None if 'upstream_line_wkb' in facility.index and facility['upstream_line_wkb'] is not None: upstream_line_geom = wkb.loads(facility['upstream_line_wkb']) if 'downstream_line_wkb' in facility.index and facility['downstream_line_wkb'] is not None: downstream_line_geom = wkb.loads(facility['downstream_line_wkb']) if 'upstream_poly_wkb' in facility.index and facility['upstream_poly_wkb'] is not None: upstream_poly_geom = wkb.loads(facility['upstream_poly_wkb']) if 'downstream_poly_wkb' in facility.index and facility['downstream_poly_wkb'] is not None: downstream_poly_geom = wkb.loads(facility['downstream_poly_wkb']) # Create map m = folium.Map( location=[facility.geometry.y, facility.geometry.x], zoom_start=13, tiles="CartoDB positron" ) # Add upstream polygons if upstream_poly_geom is not None: if upstream_poly_geom.geom_type == "Polygon": polys = [upstream_poly_geom] elif upstream_poly_geom.geom_type == "MultiPolygon": polys = list(upstream_poly_geom.geoms) else: polys = [] for poly in polys: coords = [[c[1], c[0]] for c in poly.exterior.coords] folium.Polygon( locations=coords, color=UPSTREAM_COLOR, weight=1, fill=True, fill_color=UPSTREAM_POLY_COLOR, fill_opacity=0.4, popup="Upstream water surface" ).add_to(m) # Add downstream polygons if downstream_poly_geom is not None: if downstream_poly_geom.geom_type == "Polygon": polys = [downstream_poly_geom] elif downstream_poly_geom.geom_type == "MultiPolygon": polys = list(downstream_poly_geom.geoms) else: polys = [] for poly in polys: coords = [[c[1], c[0]] for c in poly.exterior.coords] folium.Polygon( locations=coords, color=DOWNSTREAM_COLOR, weight=1, fill=True, fill_color=DOWNSTREAM_POLY_COLOR, fill_opacity=0.4, popup="Downstream water surface" ).add_to(m) # Add upstream line (animated going upstream = reversed coords) if upstream_line_geom is not None: if upstream_line_geom.geom_type == "LineString": lines = [upstream_line_geom] elif upstream_line_geom.geom_type == "MultiLineString": lines = list(upstream_line_geom.geoms) else: lines = [] for line in lines: coords = [[c[1], c[0]] for c in reversed(list(line.coords))] AntPath( locations=coords, weight=4, color=UPSTREAM_COLOR, pulse_color="#ffffff", delay=600, dash_array=[10, 20], popup="Upstream (source water)" ).add_to(m) # Add downstream line (animated going downstream) if downstream_line_geom is not None: if downstream_line_geom.geom_type == "LineString": lines = [downstream_line_geom] elif downstream_line_geom.geom_type == "MultiLineString": lines = list(downstream_line_geom.geoms) else: lines = [] for line in lines: coords = [[c[1], c[0]] for c in line.coords] AntPath( locations=coords, weight=4, color=DOWNSTREAM_COLOR, pulse_color="#ffffff", delay=600, dash_array=[10, 20], popup="Downstream (affected area)" ).add_to(m) # Add facility marker folium.Marker( location=[facility.geometry.y, facility.geometry.x], popup=f""" {facility['facilityName']}
{facility.get('city', '')}, {facility.get('countryName', '')}
Closest river: {facility['closest_river_id']}
Distance: {facility['distance_to_river_m']:.0f}m
River order: {facility['river_strahler']}
Discharge: {facility['river_discharge']:.1f} m³/s
Upstream: {facility['n_upstream']} parts
Downstream: {facility['n_downstream']} parts """, icon=folium.Icon(color='orange', icon='industry', prefix='fa') ).add_to(m) # Legend legend_html = f"""
{facility['facilityName']}
{facility.get('city', '')}

━━━ Upstream ({facility['n_upstream']})
Source water flowing toward facility

━━━ Downstream ({facility['n_downstream']})
Water flowing away (potentially affected)

River split at closest point to facility
""" m.get_root().html.add_child(folium.Element(legend_html)) # Save print(f"Saving to {output_path}...") m.save(str(output_path)) print("Done!") if __name__ == "__main__": facility_name = sys.argv[1] if len(sys.argv) > 1 else "PRECHEZA" output_path = Path(__file__).resolve().parent / "facility_map.html" create_facility_map(facility_name, output_path)