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Modelling Deformation in a Kinematic Datum

  • Chris Crook
Conference paper
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 139)

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.

Keywords

Deformation Geographic information system Global positioning systems Kinematic datum 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Land InformationWellingtonNew Zealand

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