SELECTION AND CUSTOMIZATION OF AN INTEGRATED DIGITAL PHOTOGRAMMETRIC WORKSTATION + GIS CONFIGURATION AND OPTIMIZATION OF THE INTEROPERABILITY WITHIN THE WORKFLOW FOR UPDATING THE BELGIAN TOPOGRAPHICAL REFERENCE DATABASE

摘要

Within a tender, we compared seven 'young' configurations that each combine a Digital Photogrammetric Workstation (DPW) with aGIS. This paper shows the requirements that were not fulfilled by at least one of the configurations at the moment that we verified them,and explains for some of the requirements why we consider them as important for updating tasks.According to our criteria, the most promising DPW-environment for updating a GIS by stereoplotting was the ISSG (ZI)+GeoMediaProfessional (Intergraph) configuration. By consequence we selected it and decided to thoroughly customize it into a very practicalconfiguration for updating our topographical reference database by stereoplotting. This involved the development of more than 100original tools, adapted to help our operators with updating and upgrading real, hence complex non-perfect data. There is no such thing as perfect data ! Considering this as a natural fact allows to detect imperfections and to search for ways ofcorrecting them or for avoiding them in the future. Part of the customization of our integrated DPW+GIS configuration aimed at thesetasks. We also needed supplementary cleaning tools. A few other tools have been designed for upgrading our old data to the newconceptual data model.Presentday topographical reference databases try to represent the complex real world as faithfully as possible and therefore NationalMapping Agencies use complex conceptual data models. The complexity of real data is beyond the imagination of software developers.We therefore had to develop some tools to cope with this. Many other complex tools were needed because of the workflow, in whichdifferent object themes are being updated separately. Real production situations allow us now to fine-tune all developed tools.Not knowing either what field completion pencomputer software or what validation software other departments would use in the updating workflow, at first we chose to use the selected configuration with the GeoMedia Access Warehouse format. Meanwhile, ArcView (ESRI) has been chosen for field completion and RadiusStudio (1 Spatial) has been chosen for validation in Oracle lOg with (Oracle Coorporation) SDO spatialization. After both stereoplotting and field completion, FME (Feature Manipulation Engine from Safe Software) can be used to transform the data into SDO format, before validating the updated data. The selected ISSG (ZI)+GeoMedia Professional (Intergraph) configuration and our customization can also be used with the Oracle SDO format. We now intend to do so, in order to optimize the workflow between stereoplotting and validation. This way, in the near future the validation rules may be checked by the operators themselves, without needing to transform the data and the most important rules of our (1 Spatial) RadiusStudio validation might even be checked on the fly, during the stereoplotting.