via:geojson.io

map.geojson

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "properties": {
                "OSB": ""
            },
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -0.09424209594726562,
                    51.50762061218536
                ]
            }
        }
    ]
}