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=1106023
HTTP 200 OK
Allow: OPTIONS, GET
Content-Type: application/json
Vary: Accept

{
    "features": [
        {
            "properties": {
                "pk": "440781"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                -6999999.53374967,
                                3319765.59568142
                            ],
                            [
                                -6916666.16156215,
                                3464103.23027626
                            ],
                            [
                                -6749999.41718709,
                                3464103.23027626
                            ],
                            [
                                -6666666.04499956,
                                3319765.59568142
                            ],
                            [
                                -6749999.41718709,
                                3175427.96108657
                            ],
                            [
                                -6916666.16156215,
                                3175427.96108657
                            ],
                            [
                                -6999999.53374967,
                                3319765.59568142
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "440893"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                -6499999.30062451,
                                3897116.13406079
                            ],
                            [
                                -6416665.92843698,
                                4041453.76865564
                            ],
                            [
                                -6249999.18406193,
                                4041453.76865564
                            ],
                            [
                                -6166665.8118744,
                                3897116.13406079
                            ],
                            [
                                -6249999.18406193,
                                3752778.49946595
                            ],
                            [
                                -6416665.92843698,
                                3752778.49946595
                            ],
                            [
                                -6499999.30062451,
                                3897116.13406079
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "440944"
            },
            "type": "Feature",
            "geometry": {
                "coordinates": [
                    [
                        [
                            [
                                -6249999.18406193,
                                2886752.69189689
                            ],
                            [
                                -6166665.8118744,
                                3031090.32649173
                            ],
                            [
                                -5999999.06749935,
                                3031090.32649173
                            ],
                            [
                                -5916665.69531182,
                                2886752.69189689
                            ],
                            [
                                -5999999.06749935,
                                2742415.05730204
                            ],
                            [
                                -6166665.8118744,
                                2742415.05730204
                            ],
                            [
                                -6249999.18406193,
                                2886752.69189689
                            ]
                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        }
    ],
    "crs": {
        "type": "name",
        "properties": {
            "name": "EPSG:3031"
        }
    },
    "type": "FeatureCollection"
}