Terrain Models: From Geographic Data Sources to Gantry Mill · Terrain Models: From Geographic Data...
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Terrain Models: From Geographic Data Sources to
Gantry Mill
Prepared for Association of Professional Modelmakers Conference
March 28 2010
1Paul Cote, 2010
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Harvard UniversityGraduate School of Design
Harvard University Graduate School of
Design
2Paul Cote, 2010
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Harvard UniversityGraduate School of Design
250 Architecture 50 Urban Planning
100 Urban Design 100 Landscape
500 Design Students
3Paul Cote, 2010
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Harvard UniversityGraduate School of Design
GSD Studio Culture:
75% of Student effort focused on one studio problem
100 Studios per year at the GSD
Focus on representing, understanding, modifying and evaluating places: Appearance & performance
Many Many Models are Made!!!
An intense replica of the greater world of design
A Knowledge Engine
4Paul Cote, 2010
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Harvard UniversityGraduate School of Design
Studio Information Lifecycle
Synthesis / Study:MapsDigital 3D ModelsPhysical 3D ModelsSimulation Models
Presentation Materials:Maps3D ModelsAnimationsDocument ationSources / Bibliography
Start Semester Finish
Bulk of Knowledge is Lost
End of Term
Small Fraction Suited for Re-Use Many Mysterious
Presentation Documents
Collect Information:Site PhotosGIS DataCAD DataDocumentsProcess Understanding
5Paul Cote, 2010
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Harvard UniversityGraduate School of Design
Sharing / BuildingSocietal Knowledge
New Useful Understanding
Lifecycle of Information in GeoDesign
Paul Cote, 2010 6
Evaluate:Performance
& Impacts Of Alternatives
Terrain
Vegetation
Built Systems
Ground Plan
Author / Modify / Synthesize:
Materiality, Lighting
3D Geometry / Views, Massing, Shadows
Physical 3d Models:Laser Cut, Milled, etc
Visualize / Present
Diagrammatic Representation
Discover, Obtain, Transform & Integrate existing Information
Existing Information About Places and
Performance(In-House or Internet)
Compile Data /Create Schema:
Information Infrastructure
Boards, Animations
Reuseable Data, Schema,
Procedures
Collaborate /Share:
Present:
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Harvard UniversityGraduate School of Design
Geographic Information System (e.g. ArcGIS)
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Harvard UniversityGraduate School of Design
Conceptualize Model Extents
Paul Cote, 2010 8
Context
Surround
Design Frame
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Harvard UniversityGraduate School of Design
Sources of Aerial Photography
Google Earth Pro: (earth.google.com)• International• Easy to Use• Rich Time Series
U.S. Geological Survey (www.seamless.usgs.gov)• Very High Resolution• Most Current• Georeferenced
Bing Maps (www.bing.com/maps)• Oblique
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Harvard UniversityGraduate School of Design
Conceptualize Model Extents
Paul Cote, 2010 10
Context Frame:• Neighborhood• Approaches• Horizon: • Views:
• From• of • Across
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Harvard UniversityGraduate School of Design
Conceptualize Model Extents
Paul Cote, 2010 11
Surround:Require terrain model to be logically consistent with design and context
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Harvard UniversityGraduate School of Design
Conceptualize Model Extents
Paul Cote, 2010 12
Design Frame: Limit of intervention
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Harvard UniversityGraduate School of Design
Design Frame: Existing Groundplan
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Harvard UniversityGraduate School of Design
Digital Elevation Models
Broad-Scale elevation models, gathered by aerial survey are ordinarily made available as rasters.
• US Geological Survey (seamless.usgs.gov)10 Meter Resolution, National Scope
• NASA Shuttle Topography: (http://srtm.csi.cgiar.org/) 90 Meter Resolution, Worldwide, GeoTIFF format
• MassGIS: Statewide Elevation Model:5 Meter Resolution. Statewide scope
• NOAA Massachusetts Bay Bathymetry:30 Meter (underwater only)
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Harvard UniversityGraduate School of Design
Digital Elevation ModelsUS Geological Survey (seamless.usgs.gov)10 Meter Resolution, National Scope
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Harvard UniversityGraduate School of Design
Digital Elevation Models
NASA Shuttle Topography: (http://srtm.csi.cgiar.org/) 90 Meter Resolution, Worldwide, GeoTIFF format
Paul Cote, 2010 16
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Harvard UniversityGraduate School of Design
Digital Elevation ModelsMassGIS: Statewide Elevation Model:5 Meter Resolution
Paul Cote, 2010 17
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Harvard UniversityGraduate School of Design
Digital Elevation ModelsNOAA Massachusetts Bay Bathymetry:30 Meter (underwater only)
Paul Cote, 2010 18
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Harvard UniversityGraduate School of Design
Digital Elevation ModelsMassGIS Terrestial + NOAA Bathymetry
Paul Cote, 2010 19
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Harvard UniversityGraduate School of Design
NOAA Navigation Charts
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Harvard UniversityGraduate School of Design
Generate Contours from DEM
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Harvard UniversityGraduate School of Design
Export Reference Image with Frames
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Harvard UniversityGraduate School of Design
Develop Conceptual Design
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Harvard UniversityGraduate School of Design
Prepare Conceptual Groundplan Manuscript
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Harvard UniversityGraduate School of Design
Import Contours & Images to 3d Modeling Tool (e.g. Rhinoceros3D)
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Harvard UniversityGraduate School of Design
Draw Critical Terrain Descriptors (3d Breaklines)
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Harvard UniversityGraduate School of Design
3D View of Breaklines
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Harvard UniversityGraduate School of Design
Parametric Control of 3D Curves
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Harvard UniversityGraduate School of Design
Convert Curves to PolyLines
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Harvard UniversityGraduate School of Design
Constrained Delaunay Triangulation(provided by RhinoTerrain Plugin)
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Harvard UniversityGraduate School of Design
Constrained Delaunay Triangulation(provided by RhinoTerrain Plugin)
Paul Cote, 2010 31
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Harvard UniversityGraduate School of Design
Constrained Delaunay Triangulation(provided by RhinoTerrain Plugin)
Paul Cote, 2010 32
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Harvard UniversityGraduate School of Design
Constrained Delaunay Triangulation(provided by RhinoTerrain Plugin)
Paul Cote, 2010 33
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Harvard UniversityGraduate School of Design Paul Cote, 2010 34
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Harvard UniversityGraduate School of Design Paul Cote, 2010 35
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Harvard UniversityGraduate School of Design Paul Cote, 2010 36
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Harvard UniversityGraduate School of Design Paul Cote, 2010 37
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Harvard UniversityGraduate School of Design Paul Cote, 2010 38
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Harvard UniversityGraduate School of Design Paul Cote, 2010 39
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Harvard UniversityGraduate School of Design
Scale to Inches and Set up Stock
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Harvard UniversityGraduate School of Design
Export Mesh as Stereo Lithography Exchange (STL)
Paul Cote, 2010 41
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Harvard UniversityGraduate School of Design
Import Mesh into Mill Driver Application(e.g. MasterCAM)
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Harvard UniversityGraduate School of Design
Set Up Stock Dimensions
Paul Cote, 2010 43
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Harvard UniversityGraduate School of Design
Choose Tool for Rough Milling
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Harvard UniversityGraduate School of Design
Simulate Rough Tool Path
Paul Cote, 2010 45
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Harvard UniversityGraduate School of Design
Choose Tool for Surface Finish
Paul Cote, 2010 46
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Harvard UniversityGraduate School of Design
Simulate Finish Tool Path
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Harvard UniversityGraduate School of Design
Final Contour Cut Traces Edge of Model
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Harvard UniversityGraduate School of Design
Model Checked by Milling TA
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Harvard UniversityGraduate School of Design
Double Check Tool Dimensions
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Harvard UniversityGraduate School of Design
Mount Foam Stock to Milling Table
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Harvard UniversityGraduate School of Design
Register Mill Gantry to Material
Paul Cote, 2010 52
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Harvard UniversityGraduate School of Design
Rough Surface
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Harvard UniversityGraduate School of Design
Tool Change
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Harvard UniversityGraduate School of Design
Fine Surface
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Harvard UniversityGraduate School of Design
Final Cut Trims Model
Paul Cote, 2010 56
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Harvard UniversityGraduate School of Design
Milled Model Ready for Finishing and Detailing
Paul Cote, 2010 57