The Pre-Processing Module has been developed under MS-Access. Being a data base application, the data model is organised in a very systematic way.
In the data flow, three different features have to be distinguished:
Generally, it is distinguished between online and offline operation. Online operation uses tables from ORACLE and writes the results back into STP-tables under ORACLE. All options and individually chosen parameters are written into LOG-tables.
In addition to the tables from relational databases (ORACLE and Access), GIS files are used for spatial selection.