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Add intelligent overview selection for tif to pmtiles conversion (#601)

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* load overviews instead of full detail to avoid memory bomb

* fix overview level indexing & use None when no overview for clarity

* tweak nodata value for RGBA
This commit is contained in:
Quentin Chenevier
2025-11-30 14:44:16 +01:00
committed by GitHub
parent 5ef8559b8d
commit 82d53ea0a0
2 changed files with 29 additions and 4 deletions
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6
python/rio-pmtiles/rio_pmtiles/scripts/cli.py
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@@ -335,11 +335,12 @@ def pmtiles(
warp_options["cutline"] = shapely.wkt.dumps(cutline_rev)
# Resolve the minimum and maximum zoom levels for export.
maxzoom_in_file = guess_maxzoom(src.crs, src.bounds, src.width, src.height, tile_size)
if zoom_levels:
minzoom, maxzoom = map(int, zoom_levels.split(".."))
else:
minzoom = 0
maxzoom = guess_maxzoom(src.crs, src.bounds, src.width, src.height, tile_size)
maxzoom = maxzoom_in_file
log.debug("Zoom range: %d..%d", minzoom, maxzoom)
@@ -358,7 +359,7 @@ def pmtiles(
{
"driver": img_format.upper(),
"dtype": "uint8",
"nodata": 0,
"nodata": 255 if rgba else 0,
"height": tile_size,
"width": tile_size,
"count": count,
@@ -442,6 +443,7 @@ def pmtiles(
warp_options,
creation_options,
exclude_empty_tiles,
maxzoom_in_file,
),
) as executor:
for tile, contents in executor.map(process_tile, unwrap_tiles(tiles)):