CAJ | 학술논문

基于高精度差分GPS测量数据，在详细分析规则格网数字高程模型（ DEM）构建过程中隔断线算法过程基础上，构建带约束算法的大比例尺沟道侵蚀形态的规则格网DEM，并将其与非带约束条件的规则格网DEM和实测值进行了对比。研究发现：带约束条件下的规则格网DEM能够很好地与实际形态相符合，并优于依据同样点所构建不规则三角网（ TIN）转换而来的同等分辨率的规则格网DEM，而且研究发现随着格网间距的减小，插值结果与实测值间的RMSE也随之减小，规则格网DEM对地形的表现能力渐趋增强。
기우고정도차분GPS측량수거，재상세분석규칙격망수자고정모형（ DEM）구건과정중격단선산법과정기출상，구건대약속산법적대비례척구도침식형태적규칙격망DEM，병장기여비대약속조건적규칙격망DEM화실측치진행료대비。연구발현：대약속조건하적규칙격망DEM능구흔호지여실제형태상부합，병우우의거동양점소구건불규칙삼각망（ TIN）전환이래적동등분변솔적규칙격망DEM，이차연구발현수착격망간거적감소，삽치결과여실측치간적RMSE야수지감소，규칙격망DEM대지형적표현능력점추증강。
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.