Data sources

Details

Last Updated on Friday, 30 November 2012 21:11

Primary data sources, used in a GeoDMS project, are stored in databases or in files. For each data type a storage manager is implemented, a software component that reads and often writes data in this format.
The GeoDMS supports multiple data formats, as illustrated in the next table:

1) The xdb storage manager is currently in maintenance

If a storage manager is configured, data is read from the storage when requested in a view or a calculation. Data is written to the storage when an expression and a storage manager that supports writing are configured to a data item and the results of an expression are calculated. Requesting data in a view triggers the GeoDMS to calculate results. Data can also be explicitly exported to Ascii Grid, Bitmap/Tiff of Ascii Table format with the File > Export Primary Data menu option.

Since version 5.49 The GeoDMS uses a CalcCache to store intermediate results for performance issues and to calculate with large datasets. More information on this CalcCache can be found in the CalcCache Guide.

Since version 6.045 The GeoDMS includes the GDAL library as a storage manager to read multiple spatial data formats. At the moment this GDAL storage manager can be used to read the italic formats (only to be read with GDAL) and the Esri shape format, which can still  also be read with it's original shape storage manager.

Although it is possible to refer to data sources from any location in any configuration file, it is advised to locate the configuration of the source data items in one source data container. References can be configured to data items in the source data container from other locations in the configuration.