River Network upstream / downstream search tool

This article describes a NIWA QGIS prototype plugin ("REC2") to enable simple upstream and downstream search on the New Zealand River Network (also called "River Environment Classification, version 2").

Step-by-step guide

1. Have QGIS and the "REC2" plugin installed.
   
2. Click REC2 -> Setup -> OK; REC network will be displayed
   
3. Zoom to area of interest
    
4. Click REC2->Upstream/Downstream Search; and click on select reach button
   
5. Click on Reach on Network
    
6. Click "Search Upstream" or "Search downstream" - the traced reaches will be added as new layers
   
    

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  River Network upstream / downstream search tool