Gradient based filtering of digital elevation models

Thomas Knudsen; Rune Carbuhn Andersen

Gradient based filtering of digital elevation models

Thomas Knudsen, Rune Carbuhn Andersen

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Abstract

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 language	English
Publication date	2005
Publication status	Published - 2005
Event	6th Geomatic Week Conference - Barcelona, Spain Duration: 8 Feb 2005 → 11 Feb 2005 Conference number: 6 http://www.isprs.org/proceedings/2005/semana_geomatica05/front/en/presentacio.htm

Conference

Conference	6th Geomatic Week Conference
Number	6
Country/Territory	Spain
City	Barcelona
Period	08/02/2005 → 11/02/2005
Internet address	http://www.isprs.org/proceedings/2005/semana_geomatica05/front/en/presentacio.htm

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title = "Gradient based filtering of digital elevation models",

abstract = "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 improb{\'e} 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.",

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year = "2005",

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TY - CONF

T1 - Gradient based filtering of digital elevation models

AU - Knudsen, Thomas

AU - Andersen, Rune Carbuhn

N1 - Conference code: 6

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

M3 - Poster

T2 - 6th Geomatic Week Conference

Y2 - 8 February 2005 through 11 February 2005

ER -

Gradient based filtering of digital elevation models

Abstract

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