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Landmap Strip Data: Planimetric and Height Quality Assessment

Sat, 08 Jan 2005

M.J. Smith and K. Kitmitto
Proceedings of GIS Research UK 10th Annual Conference, 326-330
The Landmap project set out to create an orthorectified digital elevation model (DEM) of the United Kingdom and Ireland using spaceborne SAR interferometry that was free from any inherited copyright. This paper provides an assessment of the planimetric and height accuracy of the Landmap DEM in comparison to the Ordnance Survey Panorama™ DEM product. Significant planimetric errors were located and these were the cause of large height errors. A description of visual artefacts is given and a brief description of surface derivatives calculated from the Landmap DEM. Since this paper was produced all planimetric errors have been corrected.

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