[Qgis-user] DTM/DEM - upstream delineation

[Tony Shepherd]

Hi All

 

Just a question to see how others are achieving this.  I often get asked to
measure the area of a catchment, upstream of a particular point.  With a
DTM/DEM I would have thought that there should be a simple tool to do this -
click a point, and then shade or draw me a polygon of everything upstream of
that point.  Sounds easy, but achieving this isn't so simple, or maybe I am
missing an easy-to-use tool or plug-in?

 

Thoughts?

 

Cheers

Tony

 

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Tony Shepherd

 GeoSpatial Manager @ FarmMaps NZ & Photographer @ Shepherd Photos

 

Phone - 027 435 6193  | Website -  <http://shepherdphotos.co.nz/>
shepherdphotos.co.nz

Email - Maps  <mailto:tony at farmmaps.nz> tony at farmmaps.nz  |  Email - Photos
<mailto:tony at shepherdphotos.co.nz> tony at shepherdphotos.co.nz

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