prospectorsn

{
  "name": "mvworker",
  "base": "",
  "fields": [
    {
      "name": "worker_id",
      "type": "ID"
    },
    {
      "name": "x",
      "type": "t_coord"
    },
    {
      "name": "y",
      "type": "t_coord"
    }
  ]
}