GIS and CAD Integration: The Bentley Perspective
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This document discusses integrating GIS and CAD systems. It outlines why each system is used, how their data can be similar but stored differently, and Bentley's approach to allowing direct access and translation between the two. Examples are provided of two customers - an engineering firm and port authority - that benefit from being able to import/export and reference data between their CAD and GIS systems using Bentley tools. A demonstration of importing SHP data into CAD concludes the document.
GIS and CAD Integration: The Bentley Perspective
- 1. GIS and CAD Integration Dave Shearon, P. Eng Bentley Canada
- 2. AgendaThe problemBentley’s solution2 customers examplesDemo
- 3. The Great DivideCAD DepartmentGIS Department
- 4. Why use CAD?Accurate Drafting Graphical InformationQuick easy to use modeling toolsDesign standardsVisualisation / Presentation2D / 3D model informationAccurate printed documents
- 5. Why use GIS?Capturing of Graphical and Attribute InformationAnalysis of Graphical / Meta DataSimple data reviewSpatial analysisVisualisation / Presentation2D / 3D model informationAccurate printed documents
- 6. Data, Data, Data Common to GIS and CAD is Digital DataSHPTABMIFGMLNTFDGN ?DWG ?DGNDWGDXFACISIGESCADGIS
- 7. CAD FilesComplex Geometry (often 3D): Cell, Line, LineString, GroupData, Shape, TextNode, Curve, ComplexString, Conic, ComplexShape, Ellipse, Arc, Text, Surface, Solid, BsplinePole, PointString, Cone, BsplineSurface, BsplineBoundary, BsplineKnot, BsplineCurve, BsplineWeight, Dimension, SharedCell, MultiLine, Tag, MatrixHeader, MatrixIntegerData, MatrixDoubleData, MeshHeader……….. (All in one file)
- 8. GIS FilesGeometry Type (often 2D):Lines, Multi lines, Multi line string, Points, Multi point, Polygon, Multi polygons, Surfaces. (in individual files)
- 9. Exchanging DataFrom CAD to GISEngineering dataNew road, utility alignments, property developmentsSurvey DataFrom GIS to CADMapping InformationExisting property, soils, wetlands, contours, road centerlines
- 10. Translate if necessary, but not necessarily translation.Direct accessCADGIS
- 11. Bentley’s ApproachAdd tools to consume GIS featuresCoordinate systemsAttribute dataTools to read the various formats(SHP, MID/MIF, ODBC, TAB, WMS, Oracle Spatial)3D support (set elevation)Users can now import or reference GIS data directly with on-the-fly coordinate conversion and full access to attribute data
- 13. Bentley’s ApproachAdd tools to specifically define GIS feature types within the CAD modelPoint, line and polygon types as well as collections.Attribute dataTools to export the various formats including attributes and coordinate systemsUsers can now export CAD data directly.Basic CAD features or well defined GIS features
- 14. Improving CAD-GIS Interoperability - Transfer only required data- segregate features destined for GIS on separate level- make sure only one feature type is on a GIS level- set a high stroking tolerance that achieves a good result- if using property data, maintain simple property types
- 15. Other toolsAutomatic feature recognitionTreats CAD elements as GIS featuresApply symbology based on attributesApplication integrationTools make GIS data available for civil, building, infrastructure applicationsServer levelIntegrate directly with Oracle Spatial and ESRI GeodatabasePublish data as WMS and WFSIndex and manage files spatially
- 16. HNTBMultidisciplinary engineering firm based in Kansas CityUse primarily geocoordination and interoperability tools to support MicroStation projectsSet GCS (geographic coordinate system) for designsImport or reference SHP data16
- 17. Benefits - HNTBDefine GCSsimplifies output to Google Earth for visualizationSimplifies working with GIS data which invariably has a defined GCSInteroperabilityNo need to go to GIS group to import SHP and create DGNWork in design environment with minimal trainingAdd on featuresThematic mapping, overlays, buffers17
- 18. Port of Long BeachSecond busiest port in the United States, moving $100 billion annuallyManages all infrastructure for the portWater, storm water, sewer and lease areas stored in ESRI geodatabase but maintained by Bentley Map using Connector for ArcGISSome layers still maintained in DGNRegular extract from geodatabase to produce up-to-date base map for engineering18
- 19. Benefits – Port of Long BeachBentley Map the preferred tool for maintenanceMaintenance tools and base maps all match defined CAD standardsImproved workflowSimilar tools for design and engineeringCan reference as-built drawings in maintenance processInteroperability with SHP and AutoCADBentley Map part of an enterprise system including ESRI Geodatabase and Geospatial Server.19
- 20. DemonstrationsImport SHPBring in GIS data to solve a problem in CAD
- 21. Conclusion GIS and CAD integration does not have to be seen as an impossible task. Through the use of standards and data management, information can travel freely between the two diciplines. This eventually leads to tremendous savings in both software and more importantly time.
Editor's Notes
- #4: Historically, architects and engineers have used CAD, CAE, and more recently BIM that worked in separate environments from GIS users. CAE or Computer-Aided Engineering refers to engineering technology involving modeling, analysis, simulation, and design often used in manufacturing and other areas involving components and assemblies
- #10: Engineering data – new road centerlines or curb lines, utility alignmentsMap data – property data, wetlands, soil types
- #11: CAD can directly read GIS data, including properties and transformed according to GIS. No translation required.
- #12: 3D support refers to the new feature of selecting a property that stores the Z value and setting the feature to that elevation. Very useful for contours.
- #13: CAD can directly read GIS data, including properties and transformed according to GIS. No translation required.