Transcript Forest of Soignes
Forest of Soignes
Project realized by Belgian Graphic Interface (BGI) for the Brussels Institute of Environment Management (IBGE)
Plan
• Context • What were the needs ?
• What were the available data ?
• The GeoEngineering MicroStation Solution • The work composition • Results • Conclusion
Context
• Environmental project for • IBGE : local governmental designed by • BGI : a company offering products and services in the field of GIS/CAD technology
Location
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)
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)
4 5 1 2 3
The work
To digitize or vectorize all the data available and especially to entry the elevation of the 3D data To clean, validate and create the polygons of the areas vectorized To register the new polygons with the data coming from the NGI To create a DTM from the 3D data and to drape the 2D data To analyze the 3D data
To accomplish this project we used the GeoEngineering MicroStation Environment
MicroStation Descartes MicroStation GeoGraphics MicroStation Geopak GeoTerrain
Vectorisation with Descartes
Soil map Geological maps
Vectorisation with Descartes
Vectorisation with Descartes
Vectorisation with Descartes
MICROSTATION DESCARTES VECTORISATION
Georeferencing TASKS Color filters Vectorisation and elevation entry TOOLS
Cleanup geologie.dgn
GAPS DANGLES SIMILAR
Cleanup geologie.dgn
SIMILAR DANGLES
Cleanup geologie.dgn
SIMILAR
geologie.dgn
Cleanup
MICROSTATION GEOGRAPHICS POLYGON GENERATION
Correction Validation and creation of polygons (over 101 vertices) TASKS Generation of areas with holes TOOLS
First results
Georefenrencing- Register
Georefenrencing- Register
Georefenrencing- Register
DTM generation Contour lines in DGN Front view
DTM generation TIN generated from the DGN 3D file
DTM generation Contour lines regenerated from the TIN
MICROSTATION GEOTERRAIN DTM GENERATION
Creation of the DTM Isohypse & isohypse label generation TASKS Draping TOOLS
DTM generation Slope analysis Slopes < 20 % Slopes > 20 %
MICROSTATION GEOTERRAIN ANALYSIS
Analyse TASKS Programming for bi-criteria analyze TOOLS
DATA WORKFLOW
MicroStation Descartes Data acquisition Photo draping, raster update MicroStation GeoGraphics Area generation MicroStation Environment Geopak GeoTerrain DTM creation Analyse
Results
Soignes data set
Ecology Soil Geology Relief
Forest of Soignes : Ecological areas
200 m Slopes < 20 % Slopes > 20 % and south aspect Slopes > 20 % and north aspect 2 km N S
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.
For more information : please contact BGI : www.bgi-sa.com
Bentley Systems : www.bentley.com