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fix(python): set defaults if mbtile headers omitted during pmtile convert (#599)

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Sam
2026-02-10 15:32:01 +00:00
committed by GitHub
parent d4b085e3ae
commit 3afa38bfd1
1 changed files with 29 additions and 11 deletions
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40
python/pmtiles/pmtiles/convert.py
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@@ -9,22 +9,40 @@ from .tile import zxy_to_tileid, tileid_to_zxy, TileType, Compression
def mbtiles_to_header_json(mbtiles_metadata): def mbtiles_to_header_json(mbtiles_metadata):
# Metadata spec: https://github.com/mapbox/mbtiles-spec/blob/master/1.3/spec.md#metadata
header = {} header = {}
# MBTiles don't work well without zooms, so we expect them to be set.
header["min_zoom"] = int(mbtiles_metadata["minzoom"]) header["min_zoom"] = int(mbtiles_metadata["minzoom"])
header["max_zoom"] = int(mbtiles_metadata["maxzoom"]) header["max_zoom"] = int(mbtiles_metadata["maxzoom"])
bounds = mbtiles_metadata["bounds"].split(",") # Default to global bounds in case 'bounds' not present.
header["min_lon_e7"] = int(float(bounds[0]) * 10000000) bounds_str = mbtiles_metadata.get("bounds", "-180.0,-85.05112878,180.0,85.05112878")
header["min_lat_e7"] = int(float(bounds[1]) * 10000000) try:
header["max_lon_e7"] = int(float(bounds[2]) * 10000000) bounds = [float(x.strip()) for x in bounds_str.split(",")]
header["max_lat_e7"] = int(float(bounds[3]) * 10000000) min_lon, min_lat, max_lon, max_lat = bounds
except Exception:
min_lon, min_lat, max_lon, max_lat = -180.0, -85.05112878, 180.0, 85.05112878
header["min_lon_e7"] = int(min_lon * 1e7)
header["min_lat_e7"] = int(min_lat * 1e7)
header["max_lon_e7"] = int(max_lon * 1e7)
header["max_lat_e7"] = int(max_lat * 1e7)
center = mbtiles_metadata["center"].split(",") # The spec expects 'center', but not all tools respect this. Provide a default as the center of the bounds.
header["center_lon_e7"] = int(float(center[0]) * 10000000) center_str = mbtiles_metadata.get("center")
header["center_lat_e7"] = int(float(center[1]) * 10000000) try:
header["center_zoom"] = int(center[2]) if center_str:
parts = [p.strip() for p in center_str.split(",")]
header["center_lon_e7"] = int(float(parts[0]) * 1e7)
header["center_lat_e7"] = int(float(parts[1]) * 1e7)
header["center_zoom"] = int(float(parts[2]))
else:
raise ValueError
except Exception:
header["center_zoom"] = header["min_zoom"]
header["center_lon_e7"] = (header["min_lon_e7"] + header["max_lon_e7"]) // 2
header["center_lat_e7"] = (header["min_lat_e7"] + header["max_lat_e7"]) // 2
tile_format = mbtiles_metadata["format"] tile_format = mbtiles_metadata["format"]
if tile_format == "pbf": if tile_format == "pbf":
@@ -88,7 +106,7 @@ def mbtiles_to_pmtiles(input, output, maxzoom):
if maxzoom: if maxzoom:
pmtiles_header["max_zoom"] = int(maxzoom) pmtiles_header["max_zoom"] = int(maxzoom)
mbtiles_metadata["maxzoom"] = maxzoom mbtiles_metadata["maxzoom"] = maxzoom
result = writer.finalize(pmtiles_header, pmtiles_metadata) writer.finalize(pmtiles_header, pmtiles_metadata)
conn.close() conn.close()