docs(pbf): archive Full production provenance and engineering history
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OpenAI Codex
190
coastline/export_fukuoka_saga_map_assets.py
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190
coastline/export_fukuoka_saga_map_assets.py
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#!/usr/bin/env python3
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"""
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NavSea coastline subset export v1.0
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把福冈/佐贺海岸样例栅格导出为浏览器可直接加载的 GeoJSON 资产：
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- blocked cells (WGS84 GeoJSON)
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- coastline lines (WGS84 GeoJSON)
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- manifest JSON
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"""
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from __future__ import annotations
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import argparse
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import json
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import math
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import sqlite3
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from pathlib import Path
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from shapely import from_wkt
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from shapely.geometry import mapping, Polygon, LineString
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RADIUS = 6378137.0
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def mercator_to_lonlat(x: float, y: float) -> tuple[float, float]:
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lon = math.degrees(x / RADIUS)
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lat = math.degrees(2.0 * math.atan(math.exp(y / RADIUS)) - math.pi / 2.0)
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return lon, lat
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def cell_polygon_lonlat(minx: float, miny: float, maxx: float, maxy: float) -> Polygon:
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lon1, lat1 = mercator_to_lonlat(minx, miny)
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lon2, lat2 = mercator_to_lonlat(maxx, maxy)
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return Polygon(
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[
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(lon1, lat1),
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(lon2, lat1),
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(lon2, lat2),
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(lon1, lat2),
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(lon1, lat1),
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]
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)
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def line_lonlat_from_wkt(wkt: str) -> LineString:
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geom = from_wkt(wkt)
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coords = [mercator_to_lonlat(x, y) for x, y in geom.coords]
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return LineString(coords)
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def main() -> None:
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parser = argparse.ArgumentParser(description="Export coastline grid assets to GeoJSON")
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parser.add_argument(
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"--source-db",
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default="out/coastline/fukuoka_saga_test/fukuoka_saga_coast_grid.sqlite",
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help="输入 SQLite",
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)
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parser.add_argument(
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"--output-dir",
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default="src/pbf/coastline",
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help="输出目录",
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)
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parser.add_argument(
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"--slug",
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default="fukuoka_saga",
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help="输出文件前缀，如 fukuoka_saga / north_kyushu",
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)
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args = parser.parse_args()
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project_root = Path(__file__).resolve().parent.parent
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source_db = Path(args.source_db)
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if not source_db.is_absolute():
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source_db = project_root / source_db
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out_dir = Path(args.output_dir)
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if not out_dir.is_absolute():
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out_dir = project_root / out_dir
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out_dir.mkdir(parents=True, exist_ok=True)
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if not source_db.exists():
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raise SystemExit(f"missing source db: {source_db}")
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conn = sqlite3.connect(source_db)
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conn.row_factory = sqlite3.Row
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manifest = {
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"version": "v1.0",
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"source_db": str(source_db),
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"grid_file": f"{args.slug}_blocked_cells.geojson",
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"coastline_file": f"{args.slug}_coastline_lines.geojson",
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"source_scope": conn.execute("SELECT value FROM meta WHERE key='source_scope'").fetchone()[0],
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"source_code": conn.execute("SELECT value FROM meta WHERE key='source_code'").fetchone()[0],
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"cell_size_m": float(conn.execute("SELECT value FROM meta WHERE key='cell_size_m'").fetchone()[0]),
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"buffer_m": float(conn.execute("SELECT value FROM meta WHERE key='buffer_m'").fetchone()[0]),
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"grid_bounds_mercator": json.loads(
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conn.execute("SELECT value FROM meta WHERE key='grid_bounds_mercator'").fetchone()[0]
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),
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}
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blocked_features = []
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blocked_rows = conn.execute(
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"""
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SELECT cell_id, ix, iy, minx, miny, maxx, maxy, state, state_name, source_mask, blocked_permille
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FROM grid_cell
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WHERE state = 2
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ORDER BY ix, iy
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"""
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).fetchall()
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for row in blocked_rows:
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geom = cell_polygon_lonlat(row["minx"], row["miny"], row["maxx"], row["maxy"])
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blocked_features.append(
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{
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"type": "Feature",
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"properties": {
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"cell_id": row["cell_id"],
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"ix": row["ix"],
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"iy": row["iy"],
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"state": row["state"],
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"state_name": row["state_name"],
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"source_mask": row["source_mask"],
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"blocked_permille": row["blocked_permille"],
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},
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"geometry": mapping(geom),
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}
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)
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coastline_features = []
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coastline_rows = conn.execute(
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"""
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SELECT source_code, prefecture, curve_id, geom_wkt
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FROM coastline_feature
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ORDER BY feature_id
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"""
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).fetchall()
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for row in coastline_rows:
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geom = line_lonlat_from_wkt(row["geom_wkt"])
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coastline_features.append(
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{
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"type": "Feature",
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"properties": {
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"source_code": row["source_code"],
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"prefecture": row["prefecture"],
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"curve_id": row["curve_id"],
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},
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"geometry": mapping(geom),
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}
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)
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blocked_geojson = {
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"type": "FeatureCollection",
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"name": "fukuoka_saga_blocked_cells",
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"features": blocked_features,
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}
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coastline_geojson = {
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"type": "FeatureCollection",
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"name": "fukuoka_saga_coastline_lines",
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"features": coastline_features,
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}
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(out_dir / f"{args.slug}_blocked_cells.geojson").write_text(
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json.dumps(blocked_geojson, ensure_ascii=False),
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encoding="utf-8",
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)
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(out_dir / f"{args.slug}_coastline_lines.geojson").write_text(
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json.dumps(coastline_geojson, ensure_ascii=False),
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encoding="utf-8",
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)
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lonlat_min = mercator_to_lonlat(manifest["grid_bounds_mercator"][0], manifest["grid_bounds_mercator"][1])
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lonlat_max = mercator_to_lonlat(manifest["grid_bounds_mercator"][2], manifest["grid_bounds_mercator"][3])
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manifest["grid_bounds_lonlat"] = [lonlat_min[0], lonlat_min[1], lonlat_max[0], lonlat_max[1]]
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manifest["blocked_count"] = len(blocked_features)
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manifest["coastline_count"] = len(coastline_features)
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(out_dir / f"{args.slug}_manifest.json").write_text(
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json.dumps(manifest, ensure_ascii=False, indent=2),
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encoding="utf-8",
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)
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conn.close()
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print("已导出:")
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print(" -", out_dir / f"{args.slug}_blocked_cells.geojson")
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print(" -", out_dir / f"{args.slug}_coastline_lines.geojson")
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print(" -", out_dir / f"{args.slug}_manifest.json")
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if __name__ == "__main__":
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main()
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