MXD/MDB文件基准转换方法研究及软件实现

Research on MXD/MDB File Benchmark Conversion Method and Its Software Emplementation

国家CGCS2000坐标系统启用后原有大批量、多种类测绘成果向CGCS2000转换和统一已经成为亟待解决的核心技术问题之一。顾及图件转换的适用性,详细分析研究了两种常见坐标转换方案(四参数法和七参数法)在中国不同区域范围的精度差异及其影响因素,给出了两种方法在中国境内的厘米级转换精度的等效范围;进一步分析了基于MDB数据库存储的地形图格式的数据结构,给出了基于MXD/MDB文件的图形转换方案和流程,基于Arc Engine予以软件实现。最后通过多个省市地区实测成果文件验证了转换方案和转换软件的可靠性和实用性。

Since the launch of CGCS2000, the conversion and unification of the original large-volume and multi-class mapping results in various regions to CGCS2000 has become one of the core technical problems to be solved. Taking into account the applicability of the map transformation, this paper analyzes in detail the accuracy difference and its influencing factors of two common coordinate transformation schemes(four-parameter method and seven-parameter method) in different regions of China, and gives two methods in China. The equivalent range of centimeter-level conversion precision is provided;then the data structure of the topographic map format stored based on MDB database is analyzed, and the MXD/MDB-based graphics conversation scheme and flow is offered and implemented via Arc Engine software. Finally, the reliability and practicability of the proposed conversion scheme and the developed conversion software are verified by the measured results files of several provinces and cities.