Journal cover Journal topic
Proceedings of the ICA
Journal topic
Volume 2
Proc. Int. Cartogr. Assoc., 2, 41, 2019
https://doi.org/10.5194/ica-proc-2-41-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Proc. Int. Cartogr. Assoc., 2, 41, 2019
https://doi.org/10.5194/ica-proc-2-41-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  10 Jul 2019

10 Jul 2019

A New Method for Extracting Elevation Information of River System from Contours

Guifang He1 and Minshi Liu1,2 Guifang He and Minshi Liu
  • 1School of Geographic Information and Tourism, Chuzhou University, Chuzhou, China
  • 2School of Geography Science, Nanjing Normal University, Nanjing, China

Keywords: river system, elevation information, contour, spatial relationship

Abstract. Considering the existing problems in methods of extracting elevation in river system, such as low efficiency, low accuracy, elevation logic errors and other issues, this paper proposes a new method of elevation extraction based on contours. Firstly, the spatial relationship between river system and contours is constructed to improve the intersection efficiency. Secondly, the accuracy of river system elevation can be improved and river flow logical error can be avoided by using the method of interpolation of trend surface of the river section. And then, the river tree is established to avoid the logical error of river system. Many comparison experiments about efficiency, elevation accuracy and elevation logical error between this method and other two conventional methods have been carried out, and the results show that both accuracy and efficiency can be improved and there is no logical error of elevation by this method.

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