Query by coordinates (SRID 4326 - decimal degrees)

{
  "type": "object",
  "properties": {
    "lat": {
      "type": "string"
    },
    "lon": {
      "type": "string"
    },
    "park_search_radius": {
      "type": "string"
    },
    "school_search_radius": {
      "type": "string"
    }
  },
  "required": [
    "lat",
    "lon"
  ],
  "additionalProperties": false
}