THE IRANIAN NATIONAL GEODATA REVISION STRATEGY AND REALIZATION BASED ON GEODATABASE
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 included in some databases. One of...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2012-07-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B4/369/2012/isprsarchives-XXXIX-B4-369-2012.pdf |
| Summary: | 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 included
in some databases. One of the NCC major projects was designing National Topographic Database (NTDB). NCC decided to create
National Topographic Database of the entire country-based on 1:25000 coverage maps. The standard of NTDB was published in
1994 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-wise
mode and then stored in a file-based style. Besides map compilation, revision of existing maps has already been started. Key
problems of NCC are revision strategy, NTDB file-based style storage and operator challenges (NCC operators are almost preferred
to edit and revise geometry data in CAD environments). A GeoDatabase solution for national Geodata, based on NTDB map files
and operators' revision preferences, is introduced and released herein. The proposed solution extends the traditional methods to have
a seamless spatial database which it can be revised in CAD and GIS environment, simultaneously. The proposed system is the
common data framework to create a central data repository for spatial data storage and management. |
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| ISSN: | 1682-1750 2194-9034 |