[closed] Check if the a person has entered a train station

Thanks, had a good look and found the following query helped me to get the result for the train station EAST CROYDON.

node["name"="East Croydon"]"train"="yes"; "type": "node", "id": 302042289, "lat": 51.3758448, "lon": -0.0927317, "tags": { "electrified": "rail", "name": "East Croydon", "naptan:AtcoCode": "9100ECROYDN", "network": "National Rail", "platforms": "6", "postal_code": "CR0 1LF", "public_transport": "station", "railway": "station", "ref": "ECR", "source_ref": "http://en.wikipedia.org/wiki/List_of_London_railway_stations", "toilets:wheelchair": "yes", "train": "yes", "website": "http://www.nationalrail.co.uk/stations/ecr/details.html", "wheelchair": "yes", "wikipedia": "en:East Croydon station" } }, { "type": "node", "id": 676877753, "lat": 51.3760143, "lon": -0.0923223, "tags": { "name": "East Croydon", "public_transport": "stop_position", "train": "yes" } }, + 4 more stop_position sections this had 6 records which includes different platform points (log and lat) with in the station

But for me to identify the user within the railway station I need to cover the area of the whole east croydon station (land and building) the person can be anywhere here, how can i find the bounding box of the whole station so that i can then check if the person with X and Y is within the station?