The SuperMap data storage, sdb, sdd, dwg meaning of

SuperMap Objects uses a unique multi-source spatial data seamless integration of technology to provide a variety of spatial data storage format. Different data stored by different spatial data engine is responsible for maintaining. These engines include: the SDB, DGN, DWG, MDB and SDX. These engines were introduced as follows:

The SDB engine: SuperMap Objects own a hybrid spatial data organization based files and databases. A the SDB data works include two file extensions named SDB file storage space data, OLE compound document technology; extended file named SDD attribute database, Access MDB database format. Because the SDB file using the compound document technology, thus providing the ability of storing a plurality of data sets in a SDB engineering. The SDB engine supports only multi-user shared read access, but only supports single-user write operation. SDB for small systems and desktop applications;

The DGN engine: is a file-based spatial data engine, SuperMap Objects to access other software data format engine. The DGN engine provides direct access to MicroStation DGN data files. The DGN engine is a read-only engine, you can use the DGN data source, but does not provide editing features.

DWG engine: with DGN engine similar to DWG engine provides direct access to AutoCAD DWG data file. DWG engine is read-only engine.

The MDB engine: a pure database engine, Access MDB database as a data storage container. Based on the Microsoft Jet database engine implementation. The MDB engine to spatial data and non-spatial data storage in the same MDB database, truly seamless organization of spatial data and non-spatial data, at the same time easy to maintain data. The MDB support multi-user concurrent read and write operations. An MDB file can be stored in multiple data sets. SDB, MDB engine for small and medium-sized desktop applications, an MDB maximum space capacity of 1G. The MDB engines suitable for small and medium-sized applications.

SDX Engine: Based on the large databases pure relational database space engine. Seamless organization of spatial data and attribute data to support the large amount of data management, support multi-user shared read and write access support short Services and long Affairs, processing, and strict access management. SDX engine for the establishment of large-scale spatial data application. SDX engine for different database systems have broken down, and currently supports Microsoft SQL Server, Oracle, Oracle Spatial and Sybase.

SDX Plus engine: the the SuperMap company’s third-generation database engine relative to the SDX engine is concerned, all aspects of performance optimization. Support for Microsoft SQL Server, Oracle. Intro Please refer to the SuperMap SDX (+) the introduction of engines and technical white papers.

Most SDB application over several data formats, and provides hypergraph the SuperMap D-Builder to support spatial data format conversion, geographic reference system transformation, spatial data warehousing and other functions, the first of these three functions is simple described as follows:

Spatial data format conversion

Provide spatial data in a variety of other formats, such as CAD data, SHP data, E00 data, converted to SuperMap the SDB data source. The conversion is a one-to-one way: a raw data file corresponds to a the SDB data file and keep the original file directory structure, to facilitate the user to check the format conversion accuracy of the results. In order to ensure the efficiency of the conversion, format conversion, data organization ignored the original data, the default processing in accordance with the GIS tiered storage, while ignoring the projection information of the original data file.

Transform geographical frame of reference

Ignored due to format conversion projection information of the original data format conversion is complete, you need to set the SDB data source and convert projection information. Only need to set the projection transformation, the need to convert the SDB data source and target projection information, the system can work automatically.

Spatial data warehousing

Spatial data storage in the the SDB data source on the basis of. The user can according to their needs to build their own model of building a database, database rules, data restructuring. Through custom data reorganization rules, the user can set up to meet the needs of the practical application of spatial databases.

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