Generate Vector Tiles with PostGIS

AI summary

This article demonstrates how to ingest open geospatial data from the Overture Maps Foundation into a Supabase Postgres database. It covers the workflow of transforming GeoJSON into SQL via GDAL, utilizing PostGIS to generate vector tiles, and rendering that data on a map interface using MapLibre GL.

Key points

• Overture Maps provides a standardized format for downloading large-scale open geospatial data.
• GDAL's ogr2ogr tool facilitates the conversion of GeoJSON datasets into SQL files for direct Postgres insertion.
• PostGIS enables the server-side generation of binary vector tiles using the ST_AsMVT function.
• MapLibre GL can consume dynamically generated tiles from Postgres, allowing for efficient rendering of large datasets.