The third phase consisted of testing the converter and partly readapting the software. Further evaluations followed. Since 1992 the conversion runs stable. Since then the conversion software has been successfully used for other projects by Aerowest Photogrammetrie. Project accompanying consultation of the customer is considered one of the most important factors for the successful implementation of this conversion.
Quality control is a non neglectable point regarding the controlled data conversion.
A homogeneous data structure can always be achieved when converting data through the uniformity of the conversion of similar data and the possibility of drastic controls. This aspect is of equally great importance when firstly transferring data from other systems and converting them later into GFIS-IFF data format. It is almost impossible to visualise the economic value of the first acquisition of data for as GIS system or the actualising of data without the modern photogrammetry using topographical data.