Returns a group of observations given a list of points in the format (lat1, lon1), (lat2, lon2), (latN, lonN), ...

{
  "type": "object",
  "properties": {
    "callback": {
      "type": "string"
    },
    "key": {
      "type": "string"
    },
    "lang": {
      "type": "string"
    },
    "points": {
      "type": "string"
    },
    "units": {
      "type": "string"
    }
  },
  "required": [
    "key",
    "points"
  ],
  "additionalProperties": false
}