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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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