ABSTRACT
Many disciplines work with spatial data, and many people use a GIS to reference geospatial data. Starting with a concise definition of spatial data, this chapter describes how spatial data and their accuracy are related to the measurement process and one’s choice of a measurement system. The goal is to describe how 3-D spatial data can be manipulated more efficiently and how spatial data accuracy can be established without ambiguity using the GSDM as the foundation for GIS’s and the GSDI.
