@GET
  @Path("/poi/{requestUrl}")
  @Produces("application/json")
  public ResponseConverter getClosestPOI(@PathParam("requestUrl") String req) {

    // Parse requestUrl
    String[] reqs = req.split("\\+");
    Double radius = Double.valueOf(reqs[2]);
    // String category = reqs[3];
    PoiData poiData = new PoiData();
    poiData.setLatitude(Double.valueOf(reqs[0]));
    poiData.setLongitude(Double.valueOf(reqs[1]));

    // find the closest neighbors
    List<ResponseData> responses = dao.findData(poiData, radius);
    ResponseConverter rc = new ResponseConverter();
    rc.setPoiDatas(responses);

    return rc;
  }