Model of Acquisition, Transformation and Usage of Geographic Data Within an Informational System Adapted to Projecting Necessities

The necessity to attach complex information to these graphic entities as well as the possibility to make descriptive and graphic operation analysis on these items caused the GIS systems to take another direction from the CAD system simplifying the graphic representation of these entities and developing graphic processing functions, the realization of topologies and links between graphic elements and the descriptive information stored in complex relational data bases, with client/server architecture.