摘要
基于遥感影像和地形等高线数据,探讨利用Arc GIS平台实现大巴山地区地表三维可视化的技术流程.首先对遥感影像进行了几何校正和辐射校正等预处理,利用地形图矢量化并赋予高程数据,分析并对比了逐点插入法与三角网生长法,利用逐点插入法生成不规则三角网,建立了数字高程模型;其次采用一阶多项式变换进行遥感图和数字高程模型的地理配准;最后利用Arc GIS中Arc Scene三维模块将配准后的遥感影像作为表面纹理叠加到数字高程模型上,实现了大巴山地区的地表三维可视化.
Based on remote sensing image and terrain contour-line data, this paper discusses the 3D terrain visualization technology of Daba mountain by ArcGIS platform. We pretreat the remote sensing image by geometric correction and radiation correction. The elevation data is derived from the contour line. We com- pare the triangular network growth algorithm with the incremental insertion algorithm. The incremental in- sertion algorithm is used to generate the triangulated irregular network （TIN）. The digital elevation model （DEM） is established. We use the first-order polynomial transformation to complete the georeferencing of remote sensing images and digital elevation models. Finally, superposing the georeferenced remote sensing image as terrain surface texture upon the digital elevation model by 3D module ArcScene of ArcGIS, we re- alize the 3D terrain visualization of remote sensing image of Daba Mountain.
出处
《成都大学学报（自然科学版）》
2015年第2期163-166,共4页
Journal of Chengdu University（Natural Science Edition）
基金
四川省科技厅应用基础研究计划(2013JY0061)
四川省教育厅自然科学基金(14CZ0007)资助项目
