Transfer catchment ID to nodes, mouths and sources

• RivEX allows you to transfer the catchment ID numbers to your river nodes, mouths and sources layer.

• You must load the river network and node layers into ArcMap before you can use this tool.

• The node, mouths and sources layer must all have been generated by RivEX as the node ID  numbers relate to the node fields in your river network.  When RivEX attempts the transfer it will look for specific field names so to use a dataset generated by an alternative method will result in failure.

• First select the layer, polyline ID and node fields.  Click Build to create the required data dictionaries and then select the Nodes tab.  Tick "Transfer catchment ID to nodes" and the following warning message appears.

• Click Go! to start the transfer.

• A new dialog appears, this is where you select the catchment field from your river network and the layers you wish to transfer data to. In the example below, CatchID has been selected as the catchment ID field. Mouths and Sources have been selected as the layers to transfer data to.

• Placing a tick in the check box enables the drop down menu and only point layers are offered.

• Click OK starts the transfer of ID numbers. Once completed you will have a new field in your point layer with the same name as the catchment field.  If a field exists already with the same name a new name is chosen with a suffix of "_X" where X is an incremental number.  In the example above the next available field name would be CatchID_1.

• You can now visualise the new field by colour coding your data.  In the Image below the network nodes are colour coded with their new catchment ID field.

• Whilst this tool was designed primarily for transferring catchment ID's to the nodes you can "trick" RivEX into transferring other data.

• This is only sensible when the information is relevant to all nodes within a catchment.  For example you may have coded your network with your own specific catchment code and wish this to be part of your node layer.  Simply select your field from the catchment drop down box (panel 1 in the transfer settings dialog) and your information is transferred as if it were the catchment ID numbers.