© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 1
3-D Analysis & Surface Modeling
Overview
• 3D Analysis & Modeling
• A new ArcView document type: the 3D scene document
• Data sources for 3D display and analysis
• 3D visualization
• Surface modeling
• Visibility Analysis
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 2
3-D Analysis & Surface Modeling
3D Analysis & Modeling
•view 3D data sets
•convert 2D data to 3D
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 3
3-D Analysis & Surface Modeling
3D Analysis & Modeling
•feature extrusion
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 4
3-D Analysis & Surface Modeling
3D Scene Document
new document type
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 5
3-D Analysis & Surface Modeling
3D Scene Document
• TOC & viewer in separate windows
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 6
3-D Analysis & Surface Modeling
The 3D scene GUI
selection of 3D shapes or other vector features
selection of 3D graphical primitives
navigate zoom buttons rotate viewer
save as BMP or JPEG
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 7
3-D Analysis & Surface Modeling
Data sources for 3D display and analysis
• Grid data sources
• TIN data sources
• 2D shapefiles and raster data
• 3D shapefiles
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 8
3-D Analysis & Surface Modeling
Grid data sources
•Typical grid data sets from Spatial Analyst
•Create from any other supported data set
•Download DEM data
•Displayed in 3D based on cell values
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 9
3-D Analysis & Surface Modeling
TIN data sources
•Different vector data type
•Triangulated Irregular Network
•Point, line, and polygon features
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 10
3-D Analysis & Surface Modeling
TIN data sources
•Complex structure where necessary to model surface
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 11
3-D Analysis & Surface Modeling
2D shapefiles and raster data
•any 2-D theme can be displayed draped over a surface
•streams
•contour lines
•digital orthophoto
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 12
3-D Analysis & Surface Modeling
3D shapefiles: A new feature type
•2-D shapefiles have only X & Y coordinates
•3-D shapefiles incorporate a Z coordinate
•Z-value can represent any numerical phenomenon
•Any 2-D shapefile can be converted to a 3-D shapefile
•Conversion based on a constant, attribute value, or surface model
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 13
3-D Analysis & Surface Modeling
3D visualization
• Legend editing
• Seeing 2D features in 3D by draping and extruding
• Navigation and moving around in real-time
• Real-time perspective viewing
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 14
3-D Analysis & Surface Modeling
3D visualization: Legend editing
•display of TIN can be altered
•point
•line
•polygon
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 15
3-D Analysis & Surface Modeling
3D visualization: Seeing 2D features in 3D by draping and extruding
•display of 2-D theme can be altered
•offsets
•extrusion
•base height of feature
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 16
3-D Analysis & Surface Modeling
3D visualization: Seeing 2D features in 3D by draping
•DEM & streamsdraped on DEM
•orthophoto & streamsdraped on DEM
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 17
3-D Analysis & Surface Modeling
3D visualization: Seeing 2D features in 3D by extruding
•plot centers extruded by attribute value
•streams extruded by constant
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 18
3-D Analysis & Surface Modeling
Navigating the 3D Scene Document
navigate tool
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 19
3-D Analysis & Surface Modeling
3D visualization: Navigation and moving around in real-time
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 20
3-D Analysis & Surface Modeling
Surface modeling
• Contouring
• Profiling
• Color hillshade mapping
• Steepest descent
• Viewshed and visibility
• Slope and aspect calculation
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 21
3-D Analysis & Surface Modeling
Surface modeling: Contouring
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 22
3-D Analysis & Surface Modeling
•line shows green (visible)red (not visible)
Surface modeling: Profiling
•surface profile generated
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 23
3-D Analysis & Surface Modeling
Surface modeling: Color hillshade mapping
•draping with color ramping
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 24
3-D Analysis & Surface Modeling
Surface modeling: Color hillshade mapping
•draping, color ramping, and hillshading
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 25
3-D Analysis & Surface Modeling
Surface modeling: Steepest descent
•Steepest descent tool; use with TIN
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 26
3-D Analysis & Surface Modeling
Surface modeling: Viewshed and visibility
•calculation of areasvisible from a point
© Phil Hurvitz, 1999-2000
CFR 250/590 Introduction to GIS, Autumn 1999
vector_analysis_1.ppt 27
3-D Analysis & Surface Modeling
Surface modeling: Slope and aspect calculation
•slope for each cell
•aspect for each cell