docs(pbf): archive Full production provenance and engineering history
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OpenAI Codex
164
navsea_build_unified_semantic_assets.py
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164
navsea_build_unified_semantic_assets.py
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from __future__ import annotations
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import json
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import shutil
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from pathlib import Path
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from PIL import Image
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ROOT = Path(__file__).resolve().parent
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MAP_JSON = ROOT / "src/pbf/semantic_sprite_key_map_2026-08-08.json"
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SOURCE_SPRITE_JSON = Path("/mnt/sda1/www/newpec/sprite/sprite@2x.json")
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SOURCE_SPRITE_PNG = Path("/mnt/sda1/www/newpec/sprite/sprite@2x.png")
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OUTPUT_SPRITE_DIR = Path("/mnt/sda1/www/newpec/sprite-semantic-unified-20260808")
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SOURCE_STYLE = ROOT / "src/pbf/style.navsea-delivery-full-semantic-extentfix.json"
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OUTPUT_STYLE = ROOT / "src/pbf/style.navsea-delivery-full-semantic-unified-20260808.json"
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DEPLOYED_STYLE = Path("/mnt/sda1/www/newpec/domain/style.navsea-delivery-full-semantic-unified-20260808.json")
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SPRITE_URL = "http://192.168.200.184/newpec/sprite-semantic-unified-20260808/sprite"
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PBF_URL = "http://192.168.200.184/pbf-delivery-full-semantic-unified-20260808/{z}/{x}/{y}.pbf"
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def pack_sprite(mapping: dict[str, str], source_meta: dict[str, dict], scale: float, max_width: int):
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source = Image.open(SOURCE_SPRITE_PNG).convert("RGBA")
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positions: dict[str, dict] = {}
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packed: list[tuple[str, tuple[int, int, int, int]]] = []
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cursor_x = cursor_y = row_height = 0
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for old_key, new_key in mapping.items():
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meta = source_meta[old_key]
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width = max(1, round(meta["width"] * scale))
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height = max(1, round(meta["height"] * scale))
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if cursor_x and cursor_x + width > max_width:
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cursor_x = 0
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cursor_y += row_height
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row_height = 0
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packed.append((old_key, (cursor_x, cursor_y, width, height)))
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positions[new_key] = {
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"x": cursor_x,
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"y": cursor_y,
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"width": width,
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"height": height,
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"pixelRatio": 1 if scale == 0.5 else 2,
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}
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cursor_x += width
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row_height = max(row_height, height)
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image = Image.new("RGBA", (max_width, cursor_y + row_height), (0, 0, 0, 0))
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for old_key, (x, y, width, height) in packed:
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meta = source_meta[old_key]
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crop = source.crop((meta["x"], meta["y"], meta["x"] + meta["width"], meta["y"] + meta["height"]))
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if scale != 1.0:
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crop = crop.resize((width, height), Image.Resampling.LANCZOS)
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image.paste(crop, (x, y))
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return image, positions
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def replace_literals(value, mapping: dict[str, str]):
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if isinstance(value, dict):
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return {key: replace_literals(item, mapping) for key, item in value.items()}
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if isinstance(value, list):
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return [replace_literals(item, mapping) for item in value]
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if isinstance(value, str):
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return mapping.get(value, value)
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return value
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def build_style(mapping: dict[str, str]) -> dict:
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style = json.loads(SOURCE_STYLE.read_text(encoding="utf-8"))
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style = replace_literals(style, mapping)
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# The source style contains a second, older semantic vocabulary such as
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# ``buoy_can`` and ``coastal_lighthouse``. Those names are not guaranteed
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# to exist in the actual PNG atlas. The delivery PBF already carries the
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# resolved, auditable image key in chart_icon_image/chart_fill_pattern, so
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# use those properties as the single style/sprite contract. This also
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# makes an unavailable source image render as empty instead of silently
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# pointing at a non-existent sprite key.
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direct_icon = ["coalesce", ["get", "chart_icon_image"], ""]
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direct_fill_pattern = ["coalesce", ["get", "chart_fill_pattern"], ""]
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direct_line_pattern = ["coalesce", ["get", "chart_line_pattern"], ""]
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for layer in style.get("layers", []):
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layer_id = layer.get("id")
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if layer_id in {
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"hazard-points",
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"anchorage-symbols",
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"anchor-hazard-points",
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"anchor-hazard-points-428",
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"nav-marks-harbor-lighthouses",
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"nav-marks-breakwater-lighthouses",
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"nav-marks-small-lights",
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"nav-marks-light-beacons",
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"nav-marks",
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"facility-points",
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"pilot-station-points",
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"landmark-points",
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}:
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layer.setdefault("layout", {})["icon-image"] = direct_icon
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if layer.get("id") == "nav-light-arc":
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layer.setdefault("layout", {})["icon-image"] = [
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"case",
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["has", "arc_id"],
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["get", "arc_id"],
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[
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"match",
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["get", "light_color_code"],
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"green",
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mapping["arc-daytime-m1"],
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"red",
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mapping["arc-daytime-m2"],
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mapping["arc-daytime-m3"],
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],
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]
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if layer_id == "nav-light-flare":
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layer.setdefault("layout", {})["icon-image"] = [
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"match",
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["get", "light_color_code"],
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"green",
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mapping["light-daytime-1"],
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"red",
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mapping["light-daytime-2"],
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"yellow",
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mapping["light-daytime-3"],
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"white",
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mapping["light-daytime-3"],
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"amber",
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mapping["light-daytime-3"],
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"orange",
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mapping["light-daytime-3"],
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mapping["light-daytime-3"],
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]
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if layer_id == "fishery-areas":
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layer.setdefault("paint", {})["fill-pattern"] = direct_fill_pattern
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if layer_id == "special-pattern-line-754":
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layer.setdefault("paint", {})["line-pattern"] = direct_line_pattern
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style["name"] = "NavSea Delivery Full Semantic Unified 20260808"
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style["sprite"] = SPRITE_URL
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source = style.get("sources", {}).get("navsea_delivery")
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if source:
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source["tiles"] = [PBF_URL]
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return style
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def main() -> None:
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mapping = json.loads(MAP_JSON.read_text(encoding="utf-8"))
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source_meta = json.loads(SOURCE_SPRITE_JSON.read_text(encoding="utf-8"))
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if OUTPUT_SPRITE_DIR.exists():
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shutil.rmtree(OUTPUT_SPRITE_DIR)
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OUTPUT_SPRITE_DIR.mkdir(parents=True, exist_ok=True)
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for scale, json_name, png_name, width in (
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(1.0, "sprite@2x.json", "sprite@2x.png", 2048),
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(0.5, "sprite.json", "sprite.png", 1024),
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):
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image, metadata = pack_sprite(mapping, source_meta, scale, width)
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image.save(OUTPUT_SPRITE_DIR / png_name)
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(OUTPUT_SPRITE_DIR / json_name).write_text(json.dumps(metadata, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
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style = build_style(mapping)
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OUTPUT_STYLE.write_text(json.dumps(style, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
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DEPLOYED_STYLE.parent.mkdir(parents=True, exist_ok=True)
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DEPLOYED_STYLE.write_text(json.dumps(style, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
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print(json.dumps({"sprite_dir": str(OUTPUT_SPRITE_DIR), "sprite_keys": len(mapping), "style": str(OUTPUT_STYLE), "deployed_style": str(DEPLOYED_STYLE)}, ensure_ascii=False, indent=2))
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if __name__ == "__main__":
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main()
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