Agic 2009 Getting Spatial Map

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AutoCAD Map includes substantial capability to do spatial analysis processing. This presentation reviews the techniqeus

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Agic 2009 Getting Spatial Map

  1. 1. Getting Spatial: Spatial Analysis Tools in AutoCAD Map 3D Richard E Chappell Geospatial Application Engineer © 2009 Autodesk
  2. 2. Welcome Richard Chappell – “Rick” Geospatial Application Engineer CADsoft Consulting, Inc 1295 W. Washington St., Suite 201, Tempe, AZ 85281 480-820-0408 rick.chappell@cadsoft-consult.com http://www.cadsoft-consult.com/blogs/geo/ http://www.linkedin.com/in/richardchappell © 2009 Autodesk
  3. 3. Objectives  Participants to gain a basic of the Spatial Analysis tools in AutoCAD Map 3D 2010  To differentiate between analysis with topologies and FDO  To become familiar with AutoCAD Map topology  To become familiar with network and polygon analysis with topology  To become familiar with analysis with FDO feature sources © 2009 Autodesk
  4. 4. Agenda  Discuss Spatial Analysis basics  Discuss AutoCAD Map approaches  Hands on practice of different methods © 2009 Autodesk
  5. 5. Tell us who you are  Name  What do you do  Experience with Autodesk products  Why you’re here © 2009 Autodesk
  6. 6. © 2009 Autodesk
  7. 7. Map Overview © 2009 Autodesk
  8. 8. Spatial Analysis in AutoCAD Map 3D AutoCAD Map provides a geospatial environment that is a hybrid of drawing features and feature sources from Feature Data Object connections.  Both may be used for analysis  AutoCAD objects require a topological relationship  FDO feature layers can be analyzed natively without converting © 2009 Autodesk
  9. 9. Topology Three types of topology  Point or Node  Line or Network  Knows the nodes at each end. Nodes know which lines are connected.  Polygon  Knows the lines, and so the points, that bound it. Lines are aware of right and left polygons © 2009 Autodesk
  10. 10. Network Topology  Each component of a network topology has a length, resistance, and direction  Network topology components, or links, are connected by nodes.  In order for drawing geometry to be used to define a network topology, the links must meet cleanly at the nodes, with no gaps or overlaps  “clean” © 2009 Autodesk
  11. 11. Managing Topologies Key Points  Topologies are stored within a drawing as object data  Topologies must be loaded to be used  Network topologies contain information about length, direction, and resistance © 2009 Autodesk
  12. 12. Network Topology Creation  Drawing cleanup is the key  Keep lines used in topology on same layer  Decide if you want blocks or other objects as nodes Good layering and drawing techniques are essential © 2009 Autodesk
  13. 13. Hands-On Exercise – Create a network topology  Open Roads.dwg  Examine the data by right-clicking on an object and selecting properties  The OD:Roads section are the object data attributes associated with the drawing object (or geometry)  In Map Explorer, right click topologies>Create  In the Create Topology – Select Topology Type dialog box:  Click Network  For Topology Name, enter Streets  For Topology Description, enter The Streets of Redding  Click Next  In the Create Network Topolgy – Select Links dialog box:  Click Select All  Click Select Layers © 2009 Autodesk
  14. 14. Hands-On Exercise – Create a network topology  In the Create Network Topology – Select Layers dialog box:  Select the ROADS layer  Click Select  In the Create Network Topology – Select Links dialog box:  Click Select All  Click Select Layers  In the Select Layers dialoge box  Select the ISECTION-NODES  Click Select  In the Create Network Topology – Select Nodes dialog box  Click Select Block Names  In the Select Blocks dialog box  Select INTERSECT  Click Select © 2009 Autodesk
  15. 15. Hands-On Exercise – Create a network topology  In the Create Network Topology  Select Nodes  Next  In Create Network Topology – Create New Nodes dialog box  Check the Create New Nodes check box  Layer – ISECTION-NODES  Point Object for Node Creation, Select INTERSCT from the list  Click Finish  In the Map Explorer  Expand the Topologies  Note that Streets topology is shown with a Network topology icon  Right-click on Streets>Statistics  Right click on an object to compare the object data © 2009 Autodesk
  16. 16. Network Topology Data  ID of each link  ID of each node  Starting and ending node for each link  Direction of each link  Direct and reverse resistance valuesfor each link  Resistance for each node. © 2009 Autodesk
  17. 17. Network Topology Tools  Shortest path  Best Route  Flood Trace © 2009 Autodesk
  18. 18. Guidelines for Performing Network Analysis  All links are initially defined as bidirectional  All links initially carry a resistance value equal to their length  All nodes initially carry a resistance value of 0  The starting and ending nodes are based on the direction the object was initially drawn in.  Because initial values set to 0, store attribute data in other associated data tables  You can store additional data in object data tables or external databases that are linked to your network topology to provide additional value to network analyses © 2009 Autodesk
  19. 19. Hands-On Exercise – Perform Network Analysis  Right click ROADS > Analysis > Network Analysis  In the Network Topology Analysis – Select Method dialog box  Click Shortest Path  Click Next  In the Network Topology Analysis – Choose Locations dialog box  Click Select Point  In the drawing, pick anywhere on the map to establish a start point – Map will go to the nearest node  A large red X is placed at the selected node  Press Enter  Select an End point in the same manner  In the Network Topology Analysis – Resistance and Direction dialog box,  Maximum Resistance – 1000000  Click Next  In the Network Topology Analysis – Output dialog box  Ensure Highlight is checked  Color: Red  Click Finished © 2009 Autodesk
  20. 20. Polygon Topology  The geometry used to define polygon topology must be extremely clean, with no gaps, overlaps, duplicates, or crossings. The cleanup tools in Map 3D are designed to ensure this  Polygons store their topological information in centroids. You can choose to have AutoCAD Map 3D create centroids, or use preexisting objects  Polygon topology will create these object data tables:  TPMCNTR_name  TPMDESC_name  TPMID_name  TPMLINK_name  TPMNODE_name © 2009 Autodesk
  21. 21. Hands-On Exercise – Create a Polygon Topology  Open poly_topol.dwg  Start the Create Topology, and in the Create Topology dialog box  Click Polygon  Name: Redding_Parcels  Description: Parcels in Downtown Redding  Click Next  Links – All, Layers – parcels  Nodes – Selelct manually  Create new Nodes – Next  Centroids – All, layers – APN_Labels  Create New Centroids – Click Create, Layer – APN_LABELS, ACAD_POINT  Set Error markers - Finish © 2009 Autodesk
  22. 22. Polygon Analysis with Topologies  Intersect  Erase  Union  Clip  Identity  Paste © 2009 Autodesk
  23. 23. Hands-On Exercise – Perform Polygon Topology Overlay Analysis  Open polytopol_analysis.dwg  In Map Explorer, right click on topologies and select Load to load the topologies.  Right click on either or both topologies and select Show Geometry – Enter or escape to remove highlighting  Right click on PARCEL_TOPO > Analysis >Overlay  In the Topology Overlay Analysis – Analysis Type  Identity, Next  Select ZONING_TOPO as the Overlay Topology, Next  For Output Topolgy,  Name – PARCEL_ZONING  Description – Parcels with Zoning Class  Layer – Parcel_Zoning © 2009 Autodesk
  24. 24. Hands-On Exercise – Perform Polygon Topology Overlay Analysis  In the Output Attributes dialog box, select the Source and Overlay Attributes Browse to identify which attributes to carry into the new topology  Add a name for result topology – Parcel_Zoning © 2009 Autodesk
  25. 25. Analysis with FDO  Buffers  Overlays © 2009 Autodesk
  26. 26. Hands-On Exercise – Filter table Data with Buffer  Open Buffersredding.dwg – set Tool-based Ribbon  Ensure Parcels and Water Pipes are connected  On the View Ribbon > View  click Named View  Click BUFFER_ZONE  On Analyze Ribbon > Feature > Feature Buffer  Select feature – pick the water line near the center of the screen  Distance 100 feet, Layer Buffer 100 feet, Select Merging Overlapping Buffers  Note Buffer feature source appears in Display Manager © 2009 Autodesk
  27. 27. Hands-On Exercise – Filter table Data with Buffer  In Display Manager, click on Parcels layer  Click Table  In the Data Table window, click Search to Select  In the Search to Select dialog box  Click Locate on Map > Touching any Part Of > Polygon  Over the map, for Enter location Boundary, click select  Select the new Buffer area  Note the selected parcels  In the Data Table window, click Options > Export  Export the file © 2009 Autodesk
  28. 28. Hands-On Exercise – Use Feature Overlay Analysis  Open new drawing  From Windows Explorer drag PARCELS.SDF and CENSUS_BLOCK2000.SDF into the map  On Analyze Ribbon > Feature > Feature Overlay  Source – Parcels  Overlay – CensusBlk2000  Type – Identity  Next  Output  Name – Parcel_Census.sdf  Layer name – PARCEL_CENSUS  Sliver Tolerance – Suggest  Look at resulting data © 2009 Autodesk
  29. 29. Tell us how we did © 2009 Autodesk
  30. 30. Thank-You! Rick Chappell Geospatial Application Engineer CADsoft Consulting, Inc 1295 W. Washington St., Suite 201, Tempe, AZ 85281 480-820-0408 rick.chappell@cadsoft-consult.com http://www.cadsoft-consult.com/blogs/geo/ http://www.linkedin.com/in/richardchappell www.cadsoft-consult.com CAD Camp – Geospatial Day – Nov 19 http://www.cadsoft-consult.com/index.php?option=com_content&task=view&id=693&Itemid=197 © 2009 Autodesk

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