基于ArcGIS的图像自动分幅技术

Image Automatic Framing Techniques Based on ArcGIS

利用ArcGIS对矢量、栅格数据的处理功能和开放式的开发功能实现图像自动分幅.地形图是采用经纬网梯形分幅法,据此可以在ArcGIS中生成图幅的矢量图,并把新旧图幅号作为矢量的属性.通过选取图像覆盖范围内的分幅矢量获取图幅范围,应用ArcObject提供的栅格数据处理方法提取遥感图像的子图,以图幅号为文件名存放.对分幅功能实现的算法进行了详细描述,对关键的数据类型作了说明.

With application of the processing functions of ArcGIS to vector and raster grid data,and the open development functions,the image automatic framing techniques have been realized.It is known that the topographical map is based on the method of trapezoidal framing in longitude and latitude network.According to this,we can generate the vector diagram of map sheets with ArcGIS,and consider the old and new map sheer numbers as vector attributes.The map sheet scope is obtained by choosing the sub-map sheet vectors in image coverage area.The sub-maps of remote sensing images are obtained with the method of processing raster grid data provided by ArcObject（AO） and stored with map sheet numbers as their file names.In this paper,a detailed description to arithmetic skills assuring the realization of image framing functions and an explanation to the key data types has been given.