【摘要】 论述了地形图数据库更新的必要性,分析比较了版本式更新和增量式地形图数据库更新方法的优缺点,认为增量式更新具有优势。提出并分析了地形图数据库增量式更新的两种方法,分析表明版本数据求增量文件法比图幅子增量文件求和产生增量文件法在多个方面具有优势。最后提出了生产部门进行地形图数据库增量更新的方案。更多还原

【Abstract】 It is necessary to update relief map database according to this paper.Characteristics with version mode or incremental mode to update the database are analyzed and compared,and the latter is of predominance.It prompts and analyzes two methods with incremental mode to update the database,and indicates that the method from version data to incremental data file is superior to the method from map sheet sub-incremental data file to whole incremental data file in many aspects.At last,the author prompts a scheme for surveying and mapping department to update relief map database with incremental mode.更多还原