MVT: Improve driver search for TileJSON metadata

[jpalmer]

OGR MVT driver only searches for /path/to/metadata.json and it would be good to also search for /path/to.json (e.g ​http://localhost:32769/data/parcels.json) to support Tileserver-gl TileJSON endpoints without having to set the metadata_file open options.

[Even Rouault]

So you mean that if you open "MVT:http://localhost:32769/data/parcels/{z}", it should try to fetch "​http://localhost:32769/data/parcels.json". Have the parcels.json file and parcels/ subdirectory always the same radix ?

[jpalmer]

Yes. It's documented is the source data tileserver-gl docs: ​https://github.com/klokantech/tileserver-gl/blob/master/docs/endpoints.rst

[Even Rouault]

In 41406:

MVT: automatically find TileJSON metadata as generated by tileserver-gl (fixes #7227)

[jpalmer]

Thank you Even. This is wonderful.