gistfile1.txt

datatable(lng:real, lat:real)
[
    -73.956683, 40.807907,
    -73.916869, 40.818314,
    -73.989148, 40.743273,
]
| project h3_hash = geo_point_to_h3cell(lng, lat, 6)
| project h3_hash_polygon = geo_h3cell_to_polygon(h3_hash)
| summarize h3_hash_polygon_lst = make_list(h3_hash_polygon)
| project pack(
    "type", "Feature",
    "geometry", pack("type", "GeometryCollection", "geometries", h3_hash_polygon_lst),
    "properties", pack("name", "H3 polygons collection"))

map.geojson

{
  "type": "Feature",
  "geometry": {
    "type": "GeometryCollection",
    "geometries": [
      {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -73.9609635556213,
              40.829061732419916
            ],
            [
              -74.00569135138367,
              40.82168093780192
            ],
            [
              -74.01944838354662,
              40.79043914023696
            ],
            [
              -73.98852232840895,
              40.766594382212254
            ],
            [
              -73.94384490497663,
              40.77396440203852
            ],
            [
              -73.93004320296495,
              40.805189944379514
            ],
            [
              -73.9609635556213,
              40.829061732419916
            ]
          ]
        ]
      },
      {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -73.90238507875488,
              40.867671551513595
            ],
            [
              -73.94715685019348,
              40.860310688399885
            ],
            [
              -73.9609635556213,
              40.829061732419916
            ],
            [
              -73.93004320296495,
              40.805189944379514
            ],
            [
              -73.88532193106172,
              40.812540084842404
            ],
            [
              -73.87147055107177,
              40.843772725733125
            ],
            [
              -73.90238507875488,
              40.867671551513595
            ]
          ]
        ]
      },
      {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -73.94384490497663,
              40.77396440203852
            ],
            [
              -73.98852232840895,
              40.766594382212254
            ],
            [
              -74.0022744646159,
              40.73537602621502
            ],
            [
              -73.97139376102862,
              40.71154393543933
            ],
            [
              -73.92676660481357,
              40.71890320501306
            ],
            [
              -73.91296992347031,
              40.75010530534533
            ],
            [
              -73.94384490497663,
              40.77396440203852
            ]
          ]
        ]
      }
    ]
  },
  "properties": {
    "name": "H3 polygons collection"
  }
}