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GIS 1Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
GIS Lecture 10Extensions
GIS 2Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Outline•Extensions Overview•Free Add On Applications•Network Analyst•Spatial Analyst•3D Analyst•Community Visualization tools•TerraSim•Keyhole•Extensions Review
GIS 3Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
ArcGIS Extensions•http://www.esri.com/software/arcgis/arcgisxtensions/
The following ArcGIS Extension products add specialized tools and functionality to ArcView, ArcEditor and ArcInfo.
•3D Analyst•Business Analyst•Geostatistical Analyst•Military Analyst•Publisher•Schematics•Spatial Analyst
•StreetMap•Survey Analyst•Tracking Analyst•ArcPress•ArcScan •Job Tracking•MrSID Encoder
GIS 4Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Free ArcGIS Add-Ons •ArcWeb Toolbar •Tablet PC Support for ArcGIS •ArcMap GPS Support •Districting for ArcGIS
GIS 5Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Network Analyst Solves a variety of problems based on geographic networks including:
• Most efficient travel routes• Travel directions• Closest emergency vehicle or service facility to an incident
• Service areas or sales territories based on travel time
GIS 6Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Delivery Route - This path represents a delivery truck route. - With the Network Analyst, the dispatcher can define a route that with stop at each restaurant in the most efficient order and return to the warehouse.
GIS 7Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Shortest and Fastest Path -This path represents the shortest linear distance between the two locations.
- This path represents the fastest path between the same two locations used in the previous example.
- Fastest paths are based on time. You can use any measure of time ( seconds, minutes, hours, etc.)
GIS 8Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Service Areas - Overlapping and nested service areas are individual polygons.
- This allows you to use ArcView's spatial analysis tools to determine which customers or how many customers are in each service area or if any customers are serviced by more than one site.
GIS 9Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Areas within a Distance This example shows which areas are within a 10 minute walking distance of different bus stops (service area and network) and which bus routes (find best route) are serviced by the stops.
GIS 10Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Spatial Analyst Grid based layers
•Geographic data to attempt to describe, simulate or predict a real-world problem or system
•Creates continuous surfaces from scattered point features
• Maps easy to read
GIS 11Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Grid Layers• Divides geographic space into uniform blocks called cells
-Every cell represents a certain specified portion of the earth, such as a square kilometer or square meter
-Each cell is given a value that describes the site, such as elevation or landuse type
GIS 12Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Wild Fire Predictions
Original wind direction grid.
Using Spatial Analyst, add 90 degrees to each cell value in the first grid to generate a second wind direction grid.
GIS 13Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Wild Fire Predictions
GIS 14Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Soil Information Farmers can determine the soil pH values
GIS 15Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Hydrology Maps Flow direction grid from an elevation grid
Hypothetical spill points, shown by white dots, on the elevation grid. Spatial Analyst uses the flow direction and elevation values to compute the contaminant's probable downhill path.
GIS 16Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Analyst
GIS 17Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Analyst Overview•3D Analyst Extension-Surfaces-Grids-TINS-3D Shapefiles-3D Scenes-Examples
GIS 18Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Surface Model A geographic surface, or surface model, represents a spatial quantity or phenomenon that can be measured continuously over some part of the earth
Terrain Elevations DEM - Digital Elevation Model DTM - Digital Terrain Model
GIS 19Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Other Surface ExamplesGeographic phenomena
- Soil type- Land cover- Temperature- Rainfall- Population density
GIS 20Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Surface Model (Elevations) Sample elevation points that can be used to generate a surface model.
A set of sample elevation points. Each point has x,y values and a z value, which defines its elevation.
GIS 21Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Surface Model (Elevations) A surface model generated from the points and displayed in 3D perspective.
GIS 22Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Grids A grid defines geographic space as a matrix of identically-sized square cells.
Each cell holds a numeric value that measures a geographic attribute (like elevation) for that unit of space.
When the grid is drawn as a map, cells are assigned colors according to their numeric values.
GIS 23Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Grids A grid divides geographic space into cells of equal size. Each cell stores a number that measures a geographic value at that location. In this case, the numbers reflect elevation in meters.
GIS 24Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Grids An elevation grid drawn in a view. The cell values are classified by numeric range and symbolized with different colors.
GIS 25Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Grid Example Proposed shopping center plan displayed on a graded elevation surface
GIS 26Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
TIN (Triangulated Irregular Network)
A TIN is a data structure that defines geographic space as a set of contiguous, non-overlapping triangles, which vary in size and angular proportion.
GIS 27Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
TIN Structure•Defined by two elements: a set of input points with x,y, and z values, and a series of edges connecting these points to form triangles.
•Each input point becomes the node of a triangle in the TIN structure, and the output is a continuous faceted surface of triangles.
GIS 28Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
TIN The TIN structure, showing nodes (sample elevation points) and the triangles generated from them.
GIS 29Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
TIN Example Santa Barbara elevation surface
GIS 30Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Shapefiles Displays discrete geographic features
•Buildings•Rivers•Wells•Roads in 3D
GIS 31Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Shapefiles Attributes of a 2D shapefile
Attributes of a 3D shapefile
GIS 32Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Contours•Mt. Saint Helens •Start with a 2D Contour Map
GIS 33Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Contours Surface layer created
GIS 34Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Dynamic 3D Views Perspective angle in 3D Scene set at 60°
GIS 35Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Loading Extensions (3D Analyst) Tools, Extensions… Choose the 3D Analyst Extension
GIS 36Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
3D Scenes A 3D scene is a three-dimensional viewing environment for spatial data.
GIS 37Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Draping features to a 3D Model•Raster Images•Vector Features
GIS 38Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Extruding Features•Based on 3D field•Buildings extruded from height or number of floors
GIS 39Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Navigating Scenes•Set Observers and Targets
•Flythrough
GIS 40Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
ArcGlobe Fast Viewing of Large 3D Datasets
GIS 41Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Other 3D ExamplesAnalyzing Visibility•Locations from which observers can see
•Red part of the line is a gap in the line of sight
GIS 42Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Other 3D Examples Steepest-path analysis
•Flow of liquid from a certain point
GIS 43Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Other 3D Examples 3D Representation of Land Value Totals by Tax Map Grid, Concord, North Carolina, USA
GIS 44Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Other 3D Examples North Macadam Development Concept—Floor Area Ratio Massing Study, City of Portland Bureau of Planning • Results of the massing model were
used to generate a series of three-dimensional perspectives from adjacent neighborhoods and scenic points to help illustrate what the district's build-out form could look like. In addition, a regional elevation model was used to assess the impact of development on the visibility of important landscape features. This information was used to help the city, property owners, and the public understand what would be allowed under the proposed plan.
GIS 45Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Advanced Visualization Tools-Helps view, project, analyze, and understand potential alternatives and impacts via visual exploration and alternative scenarios
-Experiments with hypothetical scenarios, challenge assumptions on the fly
-Encourages participation and collaboration by engaging users and public audiences via visualization and interactive participation.
GIS 46Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Community VIZ•Community VIZ http://www.communityviz.com
GIS 47Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Criterion Planners•INDEX http://www.crit.com
GIS 48Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
TerraSim, Inc.•CMU Spin-off•TerraTools -3D GIS Visualization Software
•http://www.terrasim.com/
•One Gateway Center, Suite 2050420 Fort Duquesne Blvd.Pittsburgh, PA 15222
• (412) 232-3646(412) 232-3649 FAX
GIS 49Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Schenley Park
GIS 50Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Parametric Bridge Models
GIS 51Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
CMU Campus
GIS 52Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Urban Clutter
GIS 53Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Placement Models
GIS 54Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Keyhole http://www.keyhole.com
GIS 55Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Keyhole
GIS 56Copyright 2005 – Kristen S. Kurland, Carnegie Mellon University
Extension Review•Free or paid for add on extensions•3rd Party GIS applications•Reference Manuals Available at
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