1. Forest of Soignes Project realized by Belgian Graphic Interface (BGI) for the Brussels Institute of Environment Management (IBGE)

2. Plan Context The GeoEngineering MicroStation Solution The work composition Results Conclusion What were the needs ? What were the available data ?

3. Context Environmental project BGI : a company offering products and services in the field of GIS/CAD technology designed by IBGE : local governmental for

4. Location

5. Needs The IBGE asked BGI to create a data set about the Forest of Soignes - geology - soil - ecology - alphanumeric database to realize a thematic map about : - the slopes ( > and < to 20 %) - their aspects (north and south)

6. From Environmental data on paper Geological maps on paper Soil maps on paper A raster copy of contour lines Data provider : Belgian National Geographical Institute (NGI)

7. The work 1To digitize or vectorize all the data available and especially to entry the elevation of the 3D data 2To clean, validate and create the polygons of the areas vectorized 4To create a DTM from the 3D data and to drape the 2D data 5To analyze the 3D data 3To register the new polygons with the data coming from the NGI

8. To accomplish this project we used the GeoEngineering MicroStation Environment MicroStation MicroStation Descartes MicroStation GeoGraphics Geopak GeoTerrain

9. Vectorisation with Descartes Soil map Geological maps

10. Vectorisation with Descartes

13. VECTORISATION MICROSTATION DESCARTES Georeferencing Vectorisation and elevation entry Color filters TOOLS TASKS

14. Cleanup DANGLESGAPS SIMILAR geologie.dgn

15. Cleanup geologie.dgn DANGLES SIMILAR

16. Cleanup geologie.dgn SIMILAR

17. Cleanup geologie.dgn

18. POLYGON GENERATION MICROSTATION GEOGRAPHICS Correction Validation and creation of polygons (over 101 vertices) Generation of areas with holes TOOLSTASKS

19. First results

20. Georefenrencing- Register

23. DTM generation Contour lines in DGN Front view

24. DTM generation TIN generated from the DGN 3D file

25. DTM generation Contour lines regenerated from the TIN

26. DTM GENERATION MICROSTATION GEOTERRAIN Creation of the DTM TOOLS TASKS Draping Isohypse & isohypse label generation

27. DTM generation Slope analysis Slopes < 20 % Slopes > 20 %

28. ANALYSIS MICROSTATION GEOTERRAIN TOOLS TASKS Analyse Programming for bi-criteria analyze

29. MicroStation Environment MicroStation Descartes MicroStation GeoGraphics Geopak GeoTerrain DATA WORKFLOW Photo draping, raster update Data acquisitionArea generation DTM creation Analyse

30. Results

31. Ecology Soil Geology Relief Soignes data set

32. N S 200 m 2 km Slopes < 20 % Slopes > 20 % and south aspect Slopes > 20 % and north aspect Forest of Soignes : Ecological areas

33. Conclusion The complete interoperability between these four applications allowed us to profit of the efficient tools of each working configuration. The customizable tools (MDL, MicroStation Basic and now JAVA) allowed us to exactly fulfil the client needs.

34. BGI : www.bgi-sa.com Bentley Systems : www.bentley.com For more information : please contact