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&dataset=293
HTTP 200 OK
Allow: OPTIONS, GET
Content-Type: application/json
Vary: Accept

{
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                                -3749998.01843611,
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                            [
                                -3666664.64624859,
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                            ],
                            [
                                -3749998.01843611,
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                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "441708"
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            "geometry": {
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                                -2666664.17999826,
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                        ]
                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "442262"
            },
            "type": "Feature",
            "geometry": {
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                            [
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                            [
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                            ],
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                    ]
                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "442321"
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            "type": "Feature",
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                ],
                "type": "MultiPolygon"
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        },
        {
            "properties": {
                "pk": "442326"
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            "type": "Feature",
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                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "442814"
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            "type": "Feature",
            "geometry": {
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                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
                "pk": "442815"
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            "type": "Feature",
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                "type": "MultiPolygon"
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        {
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                ],
                "type": "MultiPolygon"
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        },
        {
            "properties": {
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            "type": "Feature",
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                ],
                "type": "MultiPolygon"
            }
        },
        {
            "properties": {
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            "type": "Feature",
            "geometry": {
                "coordinates": [
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                "type": "MultiPolygon"
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        {
            "properties": {
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        {
            "properties": {
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                "type": "MultiPolygon"
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        {
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        {
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        {
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        {
            "properties": {
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        {
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    "crs": {
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}