Optimization of interpolation parameters when deriving DEM from contour lines

Abstrakt

The objective of this paper is to optimize the interpolation parameters of the Regularized spline with tension (RST) method, in order to prepare a DEM suitable as an input for erosion modeling. Two contrasting cases, with and without a reference DEM, were investigated.

If a reference DEM was ailable, good results of interpolation were reached both by small and larger sampling steps. In the second case, it was found that small sampling steps should be avoided.

The influence of the sampling was demonstrated by topographic potential for erosion and deposition.

Klíčová slova

• Digital elevation model
• Contours
• RST interpolation
• Sampling step
• Erosion modeling
• Topographic potential