1. NETWORK ANALYSIS

2. Introduction Network-enabled line themes Generating efficient travel routes Travel directions Determining/location closest facilities Service areas

3. Network-enabled line themes: vector data Based on basic vector line themes Directionality is explicit Connectivity must be enforced

4. Network-enabled line themes: attribute structure Specific attribute coding for network analysis functions “Cost” field(s) determine impedance to travel Cost can be assigned by line length, time of travel, or any supported user-defined impedance field Travel & routing is determined by the cumulative cost of motion

5. Network-enabled line themes: cost fields Cost UnitField Name secondsSECONDS minutesMINUTES DRIVETIME IMPEDANCE TRAVELTIME hoursHOURS millimetersMILLIMETERS centimetersCENTIMETERS metersMETERS kilometersKILOMETERS inchesINCHES yardsYARDS feetFEET milesMILES nautical milesNAUTICALMILES non-time/non-distance units, such as monetary unitsCOST or UNITS Supported Cost attributes and field names

6. Network-enabling line themes Attributes must be edited for each arc Network turntables must be created (if turn impedances will be used)

7. Network-enabling line themes: attribute editing Attributes must be edited for each arc Travel Cost (1 or more fields) One-way flagging Overpasses and underpasses Closed/dead end streets

8. Network-enabling line themes: Network turntables If turn impedances will be used Create node numbers (automatically done while performing 1st routing operation) Use sample scripts to copy node numbers to arcs Create a turntable for each node containing required fields NODE# ARC1# and ARC2# (from and to arc ID numbers) Supported Cost field Prohibited turns

9. Generating efficient travel routes: prepare view Network-enabled line theme Stops point theme(s)

10. Generating efficient travel routes: define problem Load stops from point theme Return to origin Delete specific stops Alter visitation order or use optimized order Solve problem

11. Generating efficient travel routes: solved problem Total and cumulative costs calculated New route theme created

12. Travel directions

14. Determining/location closest facilities Spatial relationship between points Point to point routing along linear network Different from routes where multiple stops are used “Closest” facility really means “lowest cost” facility Costs are user-supplied as in other network functionality

15. Determining/location closest facilities: define problem Events as a point theme Facilities as a point theme Solve problem Travel to or from event Alter properties (e.g., cost field) Cost for each facility

16. Determining/location closest facilities: solved problem new theme event closest facility & cost of travel

17. Determining/location closest facilities: travel directions

18. Generate service areas: define problem load service sites from point theme solve problem compact area travel to or from site alter properties (cost)

19. Generate service areas: solved problem 5-minute service areas10-minute service areas new themes