GeoPackage (.gpkg): The Definitive Guide
A .gpkg is just a SQLite database. We tested GeoPackage and Shapefile side-by-side with GDAL 3.13.1: field names truncated to 10 characters, NULLs turned into empty strings, accents mangled by a single-byte encoding. We also checked which ogr2ogr commands work and where .gpkg is wrong.