CAJ | 학술논문

选择丘陵、高原和高山3种地形,以9个不同空缺面积的SRTM3为研究对象,基于高精度曲面建模方法(HASM)分别使用和不使用辅助数据SRTM30对SRTM3空缺插值填补,并与传统方法(TIN、SPLINE和IDW)的填补精度比较.结果表明,无论是否使用SRTM30,HASM填补精度均高于传统的方法,且在复杂地形区域填补优势较传统的方法高于平坦区域;地形复杂度和空缺面积均影响HASM填补精度,HASM在地形复杂度低且空缺面积小的区域填补精度要优于地形复杂度高且大空缺区域;基于HASM填补小空缺且地形复杂度低的区域,无需使用SRTM30,但大空缺且地形复杂度高的区域需借助SRTM30.
선택구릉、고원화고산3충지형,이9개불동공결면적적SRTM3위연구대상,기우고정도곡면건모방법(HASM)분별사용화불사용보조수거SRTM30대SRTM3공결삽치전보,병여전통방법(TIN、SPLINE화IDW)적전보정도비교.결과표명,무론시부사용SRTM30,HASM전보정도균고우전통적방법,차재복잡지형구역전보우세교전통적방법고우평탄구역;지형복잡도화공결면적균영향HASM전보정도,HASM재지형복잡도저차공결면적소적구역전보정도요우우지형복잡도고차대공결구역;기우HASM전보소공결차지형복잡도저적구역,무수사용SRTM30,단대공결차지형복잡도고적구역수차조SRTM30.
Through a case of SRTM over nine vacancies of different size classes and three terrain types including hill, plateau and mountain the void-filling accuracy of high accuracy surface modelling (HASM) with those of the classical interpolation methods including TIN, SPLINE and IDW with and without auxiliary data sources of SRTM30 are compared. The results indicates that no matter whether SRTM30 is used, HASM is more accurate than TIN, SPLINE and IDW. Compared with the classical interpolation methods, the filling superiority of HASM in complex area is higher than that in flat areas. Both the terrain type and area size of the voids have the effect on the void-filling accuracy of HASM. HASM has a higher filling accuracy for small-sized voids in relatively flat areas than for big-sized voids in mountain regions. The auxiliary data of SRTM30 should not be used for small-sized voids in relatively flat areas, but it should be used to fill big-sized voids in mountain regions.