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The tanaka package

The tanaka package has been released on CRAN. This package is a simplified implementation of the Tanaka method.
Also called “relief contours method”, “illuminated contour method” or “shaded contour lines method”, the Tanaka method enhances the representation of topography on a map using shaded contour lines.
North-west white contours represent illuminated topography and south-east black contours represent shaded topography.

The contour lines creation relies on isoband, spatial data manipulation and display rely on sf.

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