This is the first post explaining how the pmtiles extract command works to slice a smaller tileset from a larger one. Protomaps Builds contains a daily planet tileset - if you want just Canada, or South America, you can pass pmtiles extract a GeoJSON to get only that region. The first step in extracting a slice is computing a tile covering for the target region. A covering is the set of all tiles that touch the edge of the region, or lie completely within it.| protomaps.com
One detail in the PMTiles version 3 specification is a boolean flag called clustered. Popular tools like the pmtiles CLI, tippecanoe and Planetiler always create clustered archives. PMTiles is an open specification in the public domain, so this post is to aid developers in implementing this optional feature. Clustered The term clustered comes from relational databases: the PostgreSQL manual defines that “When a table is clustered, it is physically reordered based on the index information.| protomaps.com