基于Geomatics可视化功能的风景林美学评价方法研究——以南京梅花山为例

以南京梅花山为研究对象,以IKNOS,QuickBird等高分辨率遥感数据、数字高程模型为主要信息源,通过遥感图像处理与地理信息系统软件Erdas 8.7,ArcGIS 9.0提供的可视化功能,对2000年,2004年风景林美学状况进行评价.在研究区域小班界线提取、空间子集生成的基础上,根据不同类型风景林的划分标准和各自美学评价因子,在计算机屏幕上通过目视判读的方式进行风景林类型划分和美学评价因子的提取.评价因子中地形起伏状况可从地形阴影图直接获取,而眺望条件需借助于ArcGis的视域分析功能实现.研究表明:2000~2004年间,梅花山风景林美学质量呈变化不大、总体改善的趋势.针对不同风景林类型,制定了提高风景林美学等级的经营措施,探讨了可视化评价方法存在的问题和未来的研究方向.

Evaluation Method of the Aesthetic Value of Scenic Forest based on the Visualization Function of Geomatics——A Case Study of Plum Blossom Hill of Nanjing

The aesthetic value of scenic forest in Plum Blossom Hill in Nanjing in the years of 2000 and 2004 was comparatively studied by means of visualization function of software RS,GIS,Erdas version 8.7,and ArcGis version 9.0 and according to data acquired by high resolution remote sensing image of IKNOS,QuickBird and DEM system.Based on retrieval of the boundaries of subcompartments and manipulation of spatial subsets,the scenic forest types were classified and aesthetical evaluation factors were selected by visual interpretation on computer screen according to the corresponding criteria.Among the aesthetical evaluation factors,landform variation could be obtained directly by reading the shade area of sub-compartment,while the viewing condition could be analyzed by view-shed of ArcGis.Evaluation results showed that there was no evident change in aesthetic quality of the scenic forest in Plum Blossom Hill during the period from 2000 to 2004,but with improving tendency.Suggestions were put forward to improve the aesthetic grade of the scenic forest towards different forest types,the problems related to the visualization method were analyzed,and the corresponding research trends were discussed.