地方坐标系图幅结合表生成及其向国家坐标系的坐标转换

省级测绘档案资料馆馆藏了该省内各市、县的1∶500,1∶1 000等大比例尺地形图数据,这些数据大多采用地方坐标系。由于城市大比例尺数据的空间参考多为地方坐标系,使得对大比例尺数据进行统一查询、统计、定位难以实现。本文提出由地方坐标系地形图数据的图幅号生成相应的结合表,并将其转换到国家坐标系,将国家坐标系下的大比例尺结合表叠加到国家基本比例尺地形图数据中,可快速查询、定位到需要的城市大比例尺数据。

Generation of Map Table Based on Local Coordinate System and Its Transformation to National Coordinate System

Provincial archives of surveying and mapping collect a large number of large-scale topographic maps including 1：500 and 1：1000 of cities in the province, and these data are mostly based on the local coordinate system. As the difference between local coordinate systems, its difficult to do query, statistic and positioning on these data in the same coordinate system. It is proposed in this paper that the map tables generated by large-scale topographic maps can be overlaid by national basic scale topographic maps, and in this way, it can quickly to query and navigate the needs of large - scale topographic maps.