Country boundaries for the whole world in two serverless geo tiers derived from the same Natural Earth source: a PMTiles archive the map renders in place (any size, no tile server), and a GeoParquet twin DuckDB-Wasm runs spatial SQL over in place — bbox pre-filter to prune Parquet row groups, then ST_Intersects, rendered as a live overlay. Render tier + query tier on one dataset.

PDDL-1.0

Public domain (Natural Earth)

World Country Boundaries

Vector tiles rendered by MapLibre GL over HTTP range requests; only the tiles in view are fetched, so any dataset size pans and zooms with no tile server.

tiles

Boundaries (PMTiles — render tier)

GeoParquet 1.1 (Hilbert-sorted, covering bbox column) queried in place with DuckDB-Wasm + spatial. Pan the map and “Query viewport” to fetch only the features in view; click a feature for its full attributes via a DuckDB point-in-polygon lookup.

Boundaries (PMTiles — render tier)

Boundaries (GeoParquet — query tier)