全国七大江河流域重点防范区1∶1万数字高程模型(DEM)数据库的建立

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全国七大江河流域重点防范区 1∶1万数字高程模型数据库建库是一项海量数据库建库工程。如何建立图幅达上万幅、数据量几十个GB的空间数据库是建库的核心问题。总结 1∶1万DEM数据库的建库经验 ,提出在建库之前必须进行充分有效的大规模的建库试验。在数据库结构和管理系统的建立时必须牢牢树立以应用为核心。在数据质量控制问题上 ,应采用以计算机自动和辅助检查为主 ,以图面检查为辅的原则。
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