Module geo_meta 

GeoParquet and GeoArrow metadata for geometry columns.

GeoParquet: JSON metadata in Parquet file key-value metadata that tells external tools (DuckDB, QGIS, GeoPandas) which columns contain geometry and what encoding/CRS is used.

GeoArrow: Arrow extension type metadata on Binary columns so Arrow-native tools can recognize NodeDB’s spatial columns.

References:

• GeoParquet spec: https://geoparquet.org/releases/v1.1.0/
• GeoArrow spec: https://geoarrow.org/extension-types

Structs

GeoParquetColumnMeta

Metadata for a single geometry column in GeoParquet.

GeoParquetMetadata

GeoParquet metadata for a Parquet file containing geometry columns.

Constants

ARROW_EXTENSION_METADATA_KEY

ARROW_EXTENSION_NAME_KEY

Arrow field metadata keys for extension types.

GEOARROW_EXTENSION_NAME

GeoArrow extension type name for WKB-encoded geometry columns.

Functions

geoarrow_extension_metadata

GeoArrow extension metadata (JSON).

geoarrow_field_metadata

Build Arrow field metadata for a WKB geometry column.