Process queries for HexGrid objects.
:param request: HTTP GET request
:return: JSON format of HexGrid (only pk and count) or GeoJSON of the geom of HexGrid.

GET /api/occurrence/grid/?type=occurrence&taxon=8081956
HTTP 200 OK
Allow: OPTIONS, GET
Content-Type: application/json
Vary: Accept

{
    "features": [
        {
            "properties": {
                "pk": "442898"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                2750005.01219101,
                                -4618804.30703502
                            ],
                            [
                                2833338.38437853,
                                -4474466.67244017
                            ],
                            [
                                3000005.12875359,
                                -4474466.67244017
                            ],
                            [
                                3083338.50094112,
                                -4618804.30703502
                            ],
                            [
                                3000005.12875359,
                                -4763141.94162986
                            ],
                            [
                                2833338.38437853,
                                -4763141.94162986
                            ],
                            [
                                2750005.01219101,
                                -4618804.30703502
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "443006"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                3250005.24531617,
                                -5196154.84541439
                            ],
                            [
                                3333338.6175037,
                                -5051817.21081955
                            ],
                            [
                                3500005.36187875,
                                -5051817.21081955
                            ],
                            [
                                3583338.73406628,
                                -5196154.84541439
                            ],
                            [
                                3500005.36187875,
                                -5340492.48000924
                            ],
                            [
                                3333338.6175037,
                                -5340492.48000924
                            ],
                            [
                                3250005.24531617,
                                -5196154.84541439
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "443062"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                3500005.36187875,
                                -5051817.21081955
                            ],
                            [
                                3583338.73406628,
                                -4907479.5762247
                            ],
                            [
                                3750005.47844133,
                                -4907479.5762247
                            ],
                            [
                                3833338.85062886,
                                -5051817.21081955
                            ],
                            [
                                3750005.47844133,
                                -5196154.84541439
                            ],
                            [
                                3583338.73406628,
                                -5196154.84541439
                            ],
                            [
                                3500005.36187875,
                                -5051817.21081955
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        }
    ],
    "crs": {
        "type": "name",
        "properties": {
            "name": "EPSG:3031"
        }
    },
    "type": "FeatureCollection"
}