AU 2008 Presentation - it was the first geospatial PowerTrack that year

1. Getting Spatial With AutoCAD® Map
Richard E. Chappell
Geospatial Territory Manager
Rick.Chappell@gmail.com
www.richardchappell.com

2. Objectives
After attending this session, you will be able to:
 Work with AutoCAD Map in multi-user environments
 Understand spatial analysis and some of its uses
 Understand how data is used for spatial analysis
 Create smarter AutoCAD Drawings for data mining
 Perform common types of spatial analysis with AutoCAD Map

3. Teamwork: Multi-user editing
Increase your effectiveness by sharing the load

4. Multi-User Editing – Tiled
Source Drawings Current Drawings

5. Multi-User Editing – Coincident (or segregated)
Source Drawings Current Drawings

6. Multi-User Editing – Other Formats
Source Drawings and Feature Data Current Drawings

7. Multi-User Demo

8. Spaghetti and Meatballs: Working with
features
Getting to know the parts and pieces

9. Raster Data

10. Raster - Pixellation

11. Vector Data

12. Raster Vs. Vector
 A point in a raster system is a single cell, but in a raster system
is a coordinate (Accuracy depends on the data)
 A line in a raster system is a series of cells – it can falsely imply
width, but in a vector system is 2 points and the line between
them
 In a raster system, the accuracy is immediately apparent, while
in a vector, it can be misleading

13. Topology
Topology consists of these properties:
 Adjacency
 Connectivity
 Containment

14. Objects Vs Features
 Objects - AutoCAD drawing elements created and stored in the
DWG
 Defined by drawing properties – layer, color, etc
 Outside objects can be imported to become objects
 Features - Elements stored outside of the DWG file in database
or similar file, and are only referenced in the DWG file.
 No stylization properties
 Organized as layers available from the Display Manager

15. Topologies - Types
Point (or Node) Topology
 Created from AutoCAD points, blocks or text
 A new object table gets created – TPMNODE_topologyname
Lines (or network, link or chain) Topology
 Created from lines, open polylines or arcs
 A new object table gets created – TPMLINK_topologyname
 If you create nodes at the same time, a node object table gets
created as well
Polygon Topology
 Created from a set of lines, open polylines or arcs that enclose
an area. It may or may not have a centroid
 A new object table gets created – TPMCNTR_topologyname
 A link tabe is defined, and a node may be defined

16. Line Topology Demo

17. Polygon Topology Demo

18. It's not dumb data: Managing Attributes
The heart of the matter is information

19. Object Data
 Data tables stored in the drawing
 AutoCAD Map 3D only
 Tables are automatically created during topology creation
 Tables are created for data imported from other formats, such
as ESRI Shape files
 Create using ADEDEFDATA
 Add records and attach to object with ADEATTACHDATA
 View or edit the data with ADEEDITDATA
 Only accessible to Map users
 Best if data is relatively static, such as descriptive
characteristics

20. External Data
 Outside databases
 Can be connected to drawing objects
 Accessible outside the drawing
 Better for dynamic, changeable data
 Connected to the DWG file through a Universal Data Link
(UDL) file – named source.UDL
 Generate the UDL file by
 attaching database
 define a link template - MAPDEFINELT
 Generate data links - ADEGENLINK

21. External Data Demo

22. Database only – Joins and Calculates
 Add additional attribute data to your GIS features
 Once the join is made, these new attributes can be used for
labeling, themes, and analysis.
 Types of Joins
 One-to-One Join
 One-to-Many Join
 Left Outer Join
 Inner Join
Calculations – generate new data based on other data

23. Join and Calculation Demo

24. Where is it? Spatial Analysis Techniques
The “New” Math

25. Network Analysis – Shortest Path

26. Network Analysis – Best Route

27. Network Analysis – Flood trace

28. Buffer Analysis
•Buffers can be created from
point, line and polygon
topologies
•Generates a new polygon
topology
•Can be a negative number

29. Network Analysis Demo

30. Overlay Analysis - Intersection
Only areas that appear in both the source and overlay topologies are
in the result topology

31. Overlay Analysis - Identity
The result topology includes areas that appear in the source topology
and areas in the overlay topology that are within the source topology
boundary.

32. Overlay Analysis - Clip
The result topology includes areas that appear in the source topology
except where they are outside the boundary of the overlay topology.
The source topology is clipped to the outer boundary of the overlay
topology.

33. Overlay Analysis - Union
Areas that appear in either the source or the overlay topologies are in
the result topology.

34. Overlay Analysis - Erase
The result topology includes areas that appear in the source topology
except where it is covered by the overlay topology. The area covered
by the overlay topology is erased from the source topology area.

35. Overlay Analysis - Paste
The overlay topology is "pasted" on the source topology. The result
topology includes the overlay topology and any areas of the source
topology that extend beyond the boundaries of the overlay topology

36. Dissolve

37. Polygon Analysis Demo

38. Multiple Steps to get complex results

40. Review Questions
Topology is a synonym of topography.
 True
 False

41. Review Questions
To find who owns the land where a new power pole is being
installed, I could use a
 Polygon Intersection
 Line Buffer
 Point in Polygon
 Polygon Recode

42. Review Questions
Which of the following analysis operations can be accomplished
without using spatial data?
 Buffer
 Overlay
 Calculate
 Intersection
 Clipping