Hands On Use the Network_Street_Centroids_XY.dbf to create an XY Event layer that will be the input for Incident Data needed when calculating Closest Facility. Network_Street_Centroids_XY.dbf and inspect the location of these centroid points. Save the project. Loading Facilities and Incidents With the XY event theme created, it is time to add the network dataset, load Facilities and Incidents, and define the Closest Facility rules. 1. If necessary, make the Network Analyst extension active, load its toolbar, and open a Network Analyst window. 2. Click the Add Data button and navigate to the Run_Order_Model_ND, located in the Run_Order_Model feature dataset, and add it. Don't add all the feature classes that participate. 3. In the TOC, place Run_Order_Model_ND just below Streets with Speed layer and make it not visible. 4. Click the Network Analyst drop-down and select New Closest Facility. The Closest Facility group is added at the top of the TOC and the Network Analyst window. In the TOC, move the Closest Facility to a location just above the Redlands City Limits layer at the bottom of the TOC. 5. In the Network Analyst window, rightclick on Facilities and select Load Locations. Specify Fire Stations and Load From source. Carefully apply the loading parameters listed in Table 2 and click OK. Save the project. 6. Right-click on Incidents and choose Load Locations. Carefully apply the loading parameters listed in Table 3 and click OK. This may take considerable time, so be patient. If the process hangs, close ArcMap, reopen the last saved project, and load it again. Inspect the loaded incident data. If it is correct, save the project again. www.esri.com Parameter Load From: Sort Field: Location Position: Name (under Location Analysis Properties): Search Tolerance: Table 2: Facilities loading parameters Value FireStations INDEX Use Geometry LABEL 500 Feet Defining the Closest Facility Solver Parameters 1. In the TOC, right-click on Closest Facility layer and choose Properties. 2. In the General tab, rename it to Run Order Closest Facility. In the Analysis tab, set Impedance to Minutes, Default Cutoff Value to 20, and Facilities to Find to 5. Change Travel from to Facility to Incident. Accept defaults for all other parameters. 3. In the Accumulation tab, check the Length_ Mi and Minutes attributes. Click Apply to save these parameters. Click OK. Save the project. In the TOC, right-click on Closest Facility and choose Solve. Now it's time to take a break. There are literally thousands of routes in this solution so this process may take more than 20 minutes. Close Warning Message that lists the centroid points not reached in 20 minutes. Once the process has finished, save the project. 4. Open the Routes table. If it contains approximately 32,000 routes and everything else looks OK, save the project again. The ArcMap document has just increased in size from about 2 MB to more than 100 MB. Carefully fill out the dialog box when loading Fire Stations for Closest Facility analysis. Joining Station Information to Each Route Carefully study each field of the Routes attributes. This data will be used to build run orders for each street segment. Notice that the FacilityID field corresponds to the Index field in the Fire Stations table. The IncidentID field connects to the Streets Index. The FacilityRank Continued on page 44 ArcUser