DEM generation by contour line dilation

A method is developed to generate digital elevation models by means of the dilation of contour lines stored in a raster grid. An iterative procedure produces an extension of contour lines by applying alternative four-connected and eight-connected erosions of the background until the produced surface...

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Bibliographic Details
Published in:Computers & geosciences 1999-08, Vol.25 (7), p.775-783
Main Authors: Taud, Hind, Parrot, Jean-François, Alvarez, Roman
Format: Article
Language:English
Subjects:
Border extraction
C language
Digital elevation model (DEM)
Earth sciences
Earth, ocean, space
Erosion–dilation
Exact sciences and technology
Geomorphology, landform evolution
Surface generation
Surficial geology
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Summary:A method is developed to generate digital elevation models by means of the dilation of contour lines stored in a raster grid. An iterative procedure produces an extension of contour lines by applying alternative four-connected and eight-connected erosions of the background until the produced surfaces become contiguous. The limits between these surfaces correspond to a new family of intermediate contour lines that are added to the raster grid. This procedure stops when no new contour lines can be generated. C subroutines are given. The algorithm is simple to apply and has a low computational cost.
ISSN:0098-3004
1873-7803
DOI:10.1016/S0098-3004(99)00019-9