How to attribute your network

• To calculate a network attribute such as stream order, you must have a unique ID number for each polyline and populated From- and To- node fields in the attribute table of your river network.  These must be built before attempting to attribute your network.

• Select a layer, a polyline ID, From- node field and To- node field and press the build button to construct the data dictionaries.

• Tick the attribution you require and then click on Go! If you are processing your network for catchment ID or distance from mouth then you must consider the implications of forcing longest route (the default is to apply this).  Click here for more information.

• If your network does not have a field containing unique ID numbers click here to find out how to do this.

• Depending upon size of network, processing can take a few seconds to a few of minutes.  The current process and how much has been completed is always reported in the status bar of ArcMap.

• Where appropriate the metadata for the layer is updated