南京林业大学学报（自然科学版）Issue(1)：140-144,5.DOI:10.3969/j.issn.1000-2006.2014.01.025
栅格DEM中隔断线约束算法应用评价
Application evaluation of the bounding algorithm for breakline in grid DEM
摘要
Abstract
With the development of science and technology, it has been widely applied in scientific research for the large-scale DEM ( digital elevation model) with data collected in field. The use of breakline would greatly improve the quality of DEM. In this paper breakline algorithm was detailedly analyzed in the construction of regular grid DEM. The data were measured by high-precision differential GPS. The grid DEM with bounding algorithm was in the form of large-scale gully, and it was then compared with measured values and the regular grid DEM without bounding algorithm. The results indicated that the grid DEM with bounding algorithm can compare very well with the real morphology. The TIN was also constructed with the same data, and it was then converted to regular grid DEM with the same resolution. The converted DEM didn�t have better performance than the regular grid DEM. It was also found that the RMSE between measured values and interpolation results decreases with the reduction of grid spacing, which demonstrates that the regu-lar grid DEM has gradually enhanced fitting precision for terrain with decreasing grid spacing.关键词
隔断线/数字高程模型/规则格网/不规则三角网/拟合精度Key words
breakline/DEM/regular grid/triangulated irregular network ( TIN)/fitting precision分类
农业科技引用本文复制引用
胡刚,宋慧,张明礼..栅格DEM中隔断线约束算法应用评价[J].南京林业大学学报（自然科学版）,2014,(1):140-144,5.基金项目
国家自然科学基金面上项目（41173094）；中国科学院陆地水循环及地表过程重点实验室基金项目（WL2013002）；中国博士后科学基金项目 （）
