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In recent years, using of spatial database for storing and managing spatial data has become a hot topic in the field of GIS.Accordingly National Cartographic Center of Iran (NCC) produces – from time to time – some spatial data which is usually includedin some databases. One of the NCC major projects was designing National Topographic Database (NTDB). NCC decided to createNational Topographic Database of the entire country-based on 1:25000 coverage maps. The standard of NTDB was published in1994 and its database was created at the same time. In NTDB geometric data was stored in MicroStation design format (DGN)which each feature has a link to its attribute data (stored in Microsoft Access file). Also NTDB file was produced in a sheet-wisemode and then stored in a file-based style. Besides map compilation, revision of existing maps has already been started. Keyproblems of NCC are revision strategy, NTDB file-based style storage and operator challenges (NCC operators are almost preferredto edit and revise geometry data in CAD environments). A GeoDatabase solution for national Geodata, based on NTDB map filesand operators' revision preferences, is introduced and released herein. The proposed solution extends the traditional methods to havea seamless spatial database which it can be revised in CAD and GIS environment, simultaneously. The proposed system is thecommon data framework to create a central data repository for spatial data storage and management

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

THE IRANIAN NATIONAL GEODATA REVISION STRATEGY AND REALIZATION BASED ON GEODATABASE