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Quantitative Accuracy Assessment of a SPOT DEM along the Coast-Donghae City Area

  • Kim, Seung-Bum (Satellite Technology Research Center) ;
  • Lee, Hae-Yeoun (Dept. Computer Science Korea Advanced Institute of Science and Technology)
  • Published : 2000.06.01

Abstract

Quantitative accuracy assessment of a SPOT DEM (Digital Elevation Model) generated by a fully automatic software is performed along the 90km long coast around Donghae city. The theoretical requirement on the layout of the CPS (Global Positioning System) check points is derived: the Nyquist sampling. Since in practice the Nyquist frequency of a terrain is difficult to determine, the relaxed requirements are introduced and 31 check points are collected accordingly. Accuracy of the SPOT DEM is calculated to be 8.9, 11.5 and 12.0m r.m.s. in latitudinal, longitudinal and elevation directions. The bias is distinguishable from zero only for elevation and is 2.2m. The simple comparison with the world's leading commercial softwares reveals the similar accuracy level.

Keywords

References

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