A Study on the Application of Interpolation and Terrain Classification for Accuracy Improvement of Digital Elevation Model

J. Ocean Eng. Technol. 1994;8(2):64-79.

수지표고지형의 정확도 향상을 위한 지형의 분류와 보간법의 상용에 관한 연구

문두열

동의대학교 토목공학과부교수

Keywords: Terrain Topography, Interpolation, Breakline, Accuracy, Classification, Digital elevation, Inverse distance weighting power

핵심용어: 지형, 보간법, 절선, 정확도, 분류, 수치표고, 거리경중률법

Abstract

In this study, terrain classification, which was done by using the quantitative classification parameters and suitable interpolation method was applied to improve the accuracy of digital elevation models, and to increase its practical use of aerial photogrammetry. A terrain area was classified into three groups using the quantitative classification parameters to the ratio of horizontal, inclined area, magnitude of harmonic vectors, deviation of vector, the number of breakline and proposed the suitable interpolation. Also, the accuracy of digital elevation models was improved in case of large grid intervals by applying combined interpolation suitable for each terrain group. As a result of this study, I have an algorithm to perform the classification of the topography in the area of interest objectively and decided optimal data interpolation scheme for given topography.