Investigating the Effects of DEM Error in Scaling Analysis

Digital elevation models (DEMs) are prone to error and must be managed effectively as these errors can never be entirely eliminated. Thus, it is important to understand the nature of error and their sources, especially in the context of the intended use of a DEM. This paper examines the effects expected when common DEM errors propagate through a scaling analysis. The errors studied include those associated with perturbation of camera exterior orientation parameters, focal length, and DEM image coordinates, which were simulated numerically. The role of detrending was also examined. Scaling analysis, by way of the fractal dimension, was conducted using a 2-dimensional approach on a variety of surfaces before and after the introduction of error and the application of detrending. Results reveal some serious procedural implications on scaling analysis and cast doubt on the authenticity of some scaling analysis results in the absence of robust quality assessment and of independent supporting evidence.

  • Availability:
  • Authors:
    • James, Timothy D
    • Carbonneau, Patrice E
    • Lane, Stuart N
  • Publication Date: 2007-1

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 67-78
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01045058
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 6 2007 5:45PM