Contents
How to create an OD cost matrix layer?
The network dataset on which the OD cost matrix analysis will be performed. Name of the OD cost matrix network analysis layer to create. The cost attribute to be used as impedance in the analysis. Default impedance value at which to cut off searching for destinations for a given origin.
How is the OD cost matrix used in spatial analysis?
The results of OD cost matrix analyses often become input for other spatial analyses in which the network cost is more appropriate than straight-line cost. For example, predicting the movement of people in a built environment is better modeled with network costs, since people tend to travel on roads and pedestrian paths.
Can an OD cost matrix return true shapes?
OD cost matrix generates results more quickly but cannot return the true shapes of routes or their driving directions. It is designed to quickly solve large M x N problems and, as a result, does not internally contain the information required to generate route shapes and driving directions.
How does the OD cost matrix solver work?
Even though the OD cost matrix solver doesn’t output lines that follow the network, the values stored in the Lines attribute table reflect the network distance, not the straight-line distance. The results of OD cost matrix analyses often become input for other spatial analyses in which the network cost is more appropriate than straight-line cost.
How to generate an OD cost matrix in ArcGIS?
If you have already set up a profile to connect to your ArcGIS Online organization, execute the cell below to load the profile and create the GIS class object. If not, use a traditional username/password log-in e.g. my_gis = GIS (‘https://www.arcgis.com’, ‘username’, ‘password’, verify_cert=False, set_active=True)
When to use the OD cost matrix solver?
If you need driving directions or true shapes of routes, use the closest facility solver; otherwise, use the OD cost matrix solver to reduce the computation time [2]. The ArcGIS API for Python provides two ways to solve a OD Cost matrix problem, which as shown in the table below: