Creating an OD cost matrix in ArcMap

Steps:

1. Start ArcMap by clicking Start > All Programs > ArcGIS > ArcMap 10.
2. Enable the Network Analyst extension.

   Learn how to enable the Network Analyst extension

3. Click the Catalog window button on the Standard toolbar.

   The dockable Catalog window opens.

4. Using the Catalog window, navigate to the location of the network dataset and drag it into the map display or the table of contents.

   If a connection to the folder that contains the network dataset doesn't already exist, you can create one by clicking the Connect To Folder button or by typing the folder path in the Location text box.

   The Adding Network Layer dialog box opens.

5. Click No to only add the network dataset to the map. Optionally, click Yes to add the network dataset and all its source feature classes to the map.

   The network dataset is added to ArcMap as a network layer.

6. If the Network Analyst toolbar is not already present, click Customize > Toolbars > Network Analyst.

   The Network Analyst toolbar is added to ArcMap.

7. If the Network Analyst window is not already present, click the Show/Hide Network Analyst Window button on the Network Analyst toolbar.

   The dockable Network Analyst window opens.

When network analysis layers are created from the Network Analyst toolbar, they are automatically associated with the active network dataset.

8. Ensure that the correct network dataset is active.

   The active network dataset is specified in the Network Dataset drop-down list on the Network Analyst toolbar.

9. On the Network Analyst toolbar, click Network Analyst > New OD Cost Matrix.

   The network analysis layer is created and appears in the table of contents and the Network Analyst window.

   The OD cost matrix analysis layer is made up of the following network analysis classes: Origins, Destinations, Lines, Point Barriers, Line Barriers, and Polygon Barriers. The classes are empty. You need to create network analysis objects so the solver has enough information to generate a solution.

10. Add at least one origin and one destination to the analysis.

    There are several ways to add network analysis objects to an analysis layer. The most common ways are creating them using the Create Network Locations Tool or loading them from a feature class. There are two ways to load network analysis objects from a feature class: one, from ArcMap using Load Locations or, two, through geoprocessing using the Add Locations tool.

    Learn how to create network analysis objects with the Create Network Locations ToolLearn how to load network analysis objects in ArcMapLearn how to load network analysis objects using a geoprocessing tool

11. Set or change any properties for the network analysis objects you added in the last step.
    Learn about the properties of originsLearn about the properties of destinationsLearn about viewing and editing network analysis object properties
12. If you need to adjust the location of any origins or destinations, on the Network Analyst toolbar, click the Select/Move Network Location Tool.
13. Optionally, add any point, line, or polygon barriers.

    Learn more about barriers

14. Open the Layer Properties dialog box for the network analysis layer.

    Learn about opening the network analysis Layer Properties dialog box

15. Click the Analysis Settings tab.
16. Set the properties for the OD cost matrix analysis layer.
    Learn about the properties of an OD cost matrix analysis layer
17. Click OK.

The Solve button works on the network analysis layer that is active in the Network Analyst window. So ensure that the analysis layer you want to solve on is selected in the drop-down list in the Network Analyst window.

18. Click the Solve button on the Network Analyst toolbar.

If the analysis solves successfully, one or many line objects are created in the Lines network analysis class.