Adds geoparquet metadata to a parquet file

add-geoparquet-metadata.py

import json
import pyarrow.parquet as pq

path1 = "pf.parquet" 
path2 = "pf.geoparquet"

geo_metadata = {
      "version": "1.0.0-beta.1",
      "primary_column": "geometry",
      "columns": {
          "geometry": {
              "encoding": "WKB",
              "geometry_types": [
                  "Polygon"
              ],
              "bbox": [
                  -21.922951,
                  63.623751,
                  -18.40089,
                  65.565982
              ]
          }
      }
}

table = pq.read_table(path1)
metadata = {
        **(table.schema.metadata or {}),
        b"geo": json.dumps(geo_metadata).encode(),
}
new_table = table.replace_schema_metadata(metadata)
pq.write_table(new_table, path2)