Surveying involves both outdoor work (in the field collecting data using GPS, instruments taking shots, setting out buildings, pegging boundaries etc) and office work (reducing data, producing graphics, producing plans). The starting salary is about the same for graduate surveyors/engineers. One good thing is that surveyors are in even more demand than engineers, so there should still be plenty of jobs in the future.
UNSW is the best in the state for surveying. As above, entirely different to architecture though.