CREATE TABLE 'gpkg_2d_gridded_coverage_ancillary' (
  id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
  tile_matrix_set_name TEXT NOT NULL UNIQUE,
  datatype TEXT NOT NULL DEFAULT 'integer',
  scale REAL NOT NULL DEFAULT 1.0,
  offset REAL NOT NULL DEFAULT 0.0,
  precision REAL DEFAULT 1.0,
  data_null REAL,
  CONSTRAINT fk_g2dgtct_name FOREIGN KEY('tile_matrix_set_name') REFERENCES gpkg_tile_matrix_set ( table_name )
  CHECK (datatype in ('integer','float'))
 );