Hi,
this is likely a bug. I would need access to the file to investigate,
ideally through /vsicurl, /vsis3, etc. . I don't have storage to host
300 GB. And possibly try to reduce the file size by removing upper zoom
levels
Even
Le 23/02/2024 à 06:54, Patrick Young via gdal-dev a écrit :
Hello,
I've been exploring the pmtiles driver a bit, what a great way to read
giant blobs of tiles off of cloud storage, really impressed by how
fast this is.
I've been encountering a "Non increasing tile_id" when attempting to
read from coarser zoom levels for a large (~300GB) pmtile file:
https://github.com/OSGeo/gdal/blob/48ddaf28db2826c635243abd469e7c7d2e749bdc/ogr/ogrsf_frmts/pmtiles/ogrpmtilestileiterator.cpp#L329
For example, this fails for me:
ds = gdal.OpenEx("</vsis3/...", gdal.OF_VECTOR | gdal.OF_READONLY,
open_options=["ZOOM_LEVEL=0"])
lyr = ds.GetLayer()
for feat in lyr:
*** raises RuntimeError: Non increasing tile_id ***
Things seem good when I specify higher zooms (e.g. Z12 or not
specified at all), but I can't get features out of the coarser ones.
Using the "pmtiles tiles" command, I can access the 0/0/0 tile just
fine though.
Any thoughts on what could be wrong? The file was translated from a
mbtiles file via the "pmtiles convert" tool. ogrinfo is happy with it
as well:
INFO: Open of `/vsis3/.../tileset.pmtiles'
using driver `PMTiles' successful.
Metadata:
description=mvts for landcover layer
format=pbf
maxzoom=16
minzoom=0
name=mvts
scheme=tms
type=overlay
version=2
ZOOM_LEVEL=16
1: landcover
Thanks,
Patrick
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