黄土高原微地貌之梯田三维建模方法探讨

3D modeling of micro-landform of terrace

目的探讨黄土高原地区主要的农业生态地貌——梯田的三维建模。方法以水平梯田为例提出了基于格网DEM的求值建模方法与基于剖面拟合的求值建模方法。结果以陕西省绥德县韭园沟流域为试验区,基于ARC／VIEW及ERDAS软件平台对两种方法进行了初步试验,成功地实现了梯田的三维建模,格网DEM求值法建模比基于剖面拟合的求值方法更准确、逼真地生成了水平梯田的三维模型。结论格网DEM求值法建模实现宏观地形与微观地貌的统一建模,真实表达和显示地形地貌。

Aim To explore the way of building 3D model of terrace in the Loess Hilly and Gully area. Methods Two methods are used, the are feature based grid modeling and feature based profile modeling. Results Based on the data of Jiu Yuan＇gou drainage area Suide County, Shaanxi Province ,some experiments are carried out by means of ARC/VIEW and ERDAS platform, and 3D modeling of terrace is successfully accomplished. Finally, compared with the two methods, ,the former is more accurate and more simple than the latter. Conclusion Can realized 3D modeling of terrain and micro-landform with feature based grid modeling.