CREATE TABLE gpkg_2d_gridded_tile_ancillary (
  id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
  tpudt_name TEXT NOT NULL,
  tpudt_id INTEGER NOT NULL,
  scale REAL NOT NULL DEFAULT 1.0,
  offset REAL NOT NULL DEFAULT 0.0,
  min REAL DEFAULT NULL,
  max REAL DEFAULT NULL,
  mean REAL DEFAULT NULL,
  std_dev REAL DEFAULT NULL,
  CONSTRAINT fk_g2dgtat_name FOREIGN KEY (tpudt_name) REFERENCES gpkg_contents(table_name),
  UNIQUE (tpudt_name, tpudt_id)
);