Finding the Shortest Route to a Facility
Suppose that an automobile accident occurs and routes from the closest hospitals for ambulance service are needed quickly. Network Analyst can provide this information almost instantly.
Add as data to the map the data set Hospital.shp, found in
Zoom to that layer. Make the symbol for a hospital green, with a size 12.
____ 25. In the Network Analyst toolbar drop-down menu, click New Closest Facility. Note that headings for Facilities, Incidents, Routes, and three kinds of Barriers appear in the Network Analyst window.
Right-click Facilities (0). Choose Load Locations. In the window that appears, choose Hospital from the Load From drop-down menu. Click OK. Notice that several hospitals appear on the map with the symbol indicated in the Table of Contents under Closest Facility > Facilities > Located. These are, of course, in the same locations as the Hospital layer you added earlier. Facilities (0) should become Facilities (9).
____ 27. On the Network Analyst Window make sure the drop-down menu is set to Closest Facility. Right-click the text Closest Facility and click Properties to bring up a Layer Properties window. Select the Analysis Settings tab. Make the Impedance Minutes. Under Facilities To Find, change the number to 3. Travel ...