{
  "JSONSchema": {
    "title": "A localisation form",
    "type": "object",
    "required": [ "lat", "lon" ],
    "properties": {
      "lat": { "type": "number" },
      "lon": { "type": "number" }
    }
  },
  "UISchema": {
    "ui:field": "geo"
  },
  "formData": {
    "lat": 0,
    "lon": 0
  }
}