Lakehouse tables and files

A Lakehouse source reads data straight from a Lakehouse in your OneLake — the most direct way to map data you already hold in Fabric.

Tables

Connect to a Delta table in a Lakehouse. Icon Map reads the table in place; use Detect columns to pull in the schema, then choose the columns you need and set a location (longitude/latitude columns or a geometry column).

Files

Connect to a file in the Lakehouse's Files area:

• Parquet
• CSV
• GeoJSON

Files are useful for reference datasets and extracts that aren't managed as tables.

Good to know

• Reads happen as you, using your Fabric permissions — you only see data you can already access.
• Use a row limit and, for large tables, Only load data in the current map view to keep the map responsive.

Next steps

• Data sources overview — common configuration.
• Map layers overview — build a layer from this source.