Bug report #12530
Basins close to bounding box are not calculated
|Affected QGIS version:||2.8.1||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||wontfix|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||20674|
Compare the attached image to the exercise in the training manual: three peripheral basins are not calculated.
#4 Updated by Victor Olaya over 3 years ago
This is a SAGA thing, and not really an issue, but an improvement. Basins that "touch" the boundary of the layer are affected by the so-called "edge contamination", since you dont know what is upstream, and catchment area values (from where rivers and basins are computed) are not sound. So looks like SAGA decided to not add those basins.
In any case, i suggest updating the exercise screenshots, and to not consider this a bug