Abstract
The Perpendicular Distance Estimation Method (PDEM), a method to estimate the precision of a Digital Elevation Model (DEM), in “Effectiveness of Geometric Quality Control Using a Distance Evaluation Method” was tested assuming independent normal random for the vertical and horizontal error, considering isotropic this horizontal error. Here the PDEM is tested in the case of a DEM obtained by IFSAR technology, also, assuming independent normal random errors, but this time in three independent directions. Because vertical direction is correlated with one horizontal direction, -the range axis direction-, a rotation has to be done and so, three independent directions are obtained.
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