private Uri AddressesApi(string surveyId, string samplingPointId, string addressId)
{
StringBuilder uriText = new StringBuilder(ConnectionClient.NfieldServerUri.AbsoluteUri);
uriText.AppendFormat("Surveys/{0}/SamplingPoints/{1}/Addresses",
surveyId, samplingPointId);
if (!string.IsNullOrEmpty(addressId))
uriText.AppendFormat("/{0}", addressId);
return new Uri(uriText.ToString());
}