GeoParquet to CSV Converter
Flattening a GeoParquet dataset into a portable CSV for analysts who live in spreadsheets or a non-spatial database.
Common issues converting GeoParquet to CSV
- The geometry is serialized to a WKT column; the columnar geometry encoding doesn't survive as a map but is re-parseable downstream.
- GeoParquet can hold nested or list columns; those are JSON-stringified into CSV cells, since CSV is flat.
- Large GeoParquet files expand significantly as text — CSV has no compression — so expect a much larger output.
- CRS lives in GeoParquet metadata, but CSV has nowhere to store it; note it separately (WGS 84 unless reprojected).
Frequently asked questions
Where does the geometry go?
Into a geometry column as WKT, alongside every attribute column from the source.
Are nested columns supported?
Yes, but they're flattened to JSON strings, since CSV cells can't hold structured data.
Can I open it in Excel?
Yes — attributes are normal columns; the geometry column is text you can ignore or re-parse.
Will it round-trip back to GeoParquet?
Geometry and scalar attributes will; nested structures need rebuilding from the JSON strings.