dbGrid = DuckDBClient.of({
_1000: FileAttachment("grid_1km.parquet"),
_2000: FileAttachment("grid_2km@1.parquet"),
_5000: FileAttachment("grid_5km@1.parquet"),
_10000: FileAttachment("grid_10km@1.parquet"),
_20000: FileAttachment("grid_20km@1.parquet"),
_50000: FileAttachment("grid_50km@1.parquet"),
_100000: FileAttachment("grid_100km@1.parquet")
})