Gradient based filtering of digital elevation models

Thomas Knudsen, Rune Carbuhn Andersen

Research output: Contribution to conferencePosterResearchpeer-review


We present a filtering method for digital terrain models (DTMs). The method is based on mathematical morphological filtering within gradient (slope) defined domains. The intention with the filtering procedure is to improbé the cartographic quality of height contours generated from a DTM based on draping and optimum interpolation methods. The contours from the unfiltered DTM has shown to become ragged and hard-to-interpret—especially in areas of minor slope. The contours from the filtered DTM are significantly more smooth. They are however not smoothed to an extent where local breaks in the landscape are washed out and misrepresented.
Original languageEnglish
Publication date2005
Publication statusPublished - 2005
Event6th Geomatic Week Conference - Barcelona, Spain
Duration: 8 Feb 200511 Feb 2005
Conference number: 6


Conference6th Geomatic Week Conference
Internet address


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