Facts and Fallacies: A Guide to Survey Grade GIS Data
Do you wonder how accurate (or inaccurate) survey grade data really is? Should you be comfortable with GPS vertical results you’re getting? Are you aware of the all the factors that affect GPS accuracy? Have you incorporated Survey Grade Data into your projects? So how does survey grade GIS data really help you, both spatially and in your pocket?
This discussion will answer these questions and more. We will explain of some of the facts and fallacies of survey grade data. You will be brought through a quick review of the science behind GPS and the accuracies (or inaccuracies) of vertical data obtained with GPS. Our discussion will revolve around local RTK networks, the effects of atmosphere, multipath, geoids, equipment limitations and more.