DGPS activities of the Land Information Centre
D Kinlyside, Grant Dickson · 1993
The Land Information Centre has been using GPS as a geodetic surveying tool for almost a decade. In the last few years however, the Centre has also been active in testing and employing differential GPS (DGPS) techniques for a variety of applications taking advantage of the experience gained from GPS surveying. A brief description of the Centre's existing DGPS equipment and software is given. Much can be learned from experiences in undertaking projects using DGPS. As such, three specific projects are discussed which range from determining ground control for Landsat imagery to 'precise' DGPS for GIS data capture. The projects involve various combinations of GPS equipment, observations and software, and selecting the right combination depends on accuracy requirements. Results are presented to highlight the levels of accuracy that can be achieved with DGPS. Some of the technical problems encountered are considered. The paper concludes with options for further development of DGPS capabilities in NSW.