Table of Contents
- Demand-Based Site Selection for Fire Stations Using a Network Allocation Model
- Setting up Your Workspace
- Preparing the Data
- Skill Drill: Clip the Roads Layer to the City of Arcata and McKinleyville
- Skill Drill: Add a Time Cost Attribute to the Roads Layer
- Skill Drill: Creating a CSV Table to Import As XY Data
- Skill Drill: Geocoding an Address and Creating a CSV Table to Import As XY Data
- Skill Drill: Adding the Fire Incident History as XY Data
- Creating A Network Dataset
- Setting up a Network Allocation Model
- Loading Facilities into the Model
- Loading the Demand Points into the Model
- Adjusting the Analysis Setting of the Model
- Running the Network Allocation Model
- Skill Drill: Using the Maximize Attendance Problem Type
- Skill Drill: Adding Existing Fire Stations to the Model
- Skill Drill: Creating a Map of the Results
Running the Network Allocation Model
One of the advantages of creating a network allocation model via the Network Analyst extension is the ability to run the model multiple times while making small adjustments in between. In this activity, you will run several models, adjusting the parameters each time. For the first run of the model, all of our parameters were set in the previous steps. To run the model currently loaded in the Network Analyst Window, click on the Solve button in the Network Analyst Toolbar.
When the Network Analyst completes the first run, it writes the results into the temporary memory layers in the Table of Contents. Take a moment to inspect the results. Of the proposed locations, you should see three fire stations chosen. Each of the three chosen locations has lines radiating outward to demand points within the two minute travel time window. It is a useful visualization for determining the extent of a two-minute time window.
Open the attribute table from the Facilities layer in the Table of Contents. Use Select by Attributes to select the records with a Facility Type of Chosen.
Open a blank excel workbook and create a table recording the following results from your first model.
- The name of the three chosen locations
- The demand count for each location
- The demand weight for each location
Title the table, Two-minute Maximized Coverage. An example table is shown below. Actual results may vary.
|Location||Demand Count||Demand Weight|
|Sunset Fire Station||57||83|
|Samoa Fire Station||70||117|
|Hiller Fire Station||120||205|
Save your excel file in your final folder for later use.