Abstract
The growth of accurate global satellite based positioning (GNSS) on the one hand, and geographic information systems (GIS) managing spatial definitions of features in terms of coordinates on the other creates a conflict in the use of coordinates. Whereas GNSS positioning defines geocentric coordinates in terms of a global reference frame, in GIS systems they are used as a spatial reference for objects which are moving in response to tectonic deformation and other geophysical events. The coordinates of objects in GIS systems are fixed, whereas the objects are moving. Resolving this conflict requires using a deformation model. Ultimately GIS software will need to support deformation models in the definition of spatial reference systems to accommodate deformation. As GNSS makes global datums more accessible the traditional role of national geodetic agencies of providing a national datum may change to supporting a global datum and providing a national deformation model.
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Crook, C. (2014). Modelling Deformation in a Kinematic Datum. In: Rizos, C., Willis, P. (eds) Earth on the Edge: Science for a Sustainable Planet. International Association of Geodesy Symposia, vol 139. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37222-3_27
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DOI: https://doi.org/10.1007/978-3-642-37222-3_27
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