Opened 10 years ago

Last modified 5 years ago

#2218 new defect lack of documentation for flow_accum column in attribute table

Reported by: mlennert Owned by: grass-dev@…
Priority: normal Milestone: 7.8.3
Component: Addons Version: svn-releasebranch70
Keywords:, flow_accum Cc: grass-dev@…
CPU: Unspecified Platform: Unspecified


In NC data set:

g.region rast=elevation
r.watershed elevation thresh=10000 accum=accum elevation="elevation" threshold=10000 stream_rast=streams direction=dir streams=streams dirs=dir vector=stream_order elev=elevation accum=accum

stream_order attribute table now contains a column 'flow_accum'. There is no mention of this column in the man page. What exactly do the numbers in that column represent ?

Change History (10)

comment:1 by Madi, 10 years ago

Owner: changed from grass-dev@… to Madi

comment:2 by neteler, 10 years ago

Keywords: flow_accum →, flow_accum
Version: unspecifiedsvn-releasebranch70

comment:3 by neteler, 9 years ago

Cc: grass-dev@… added

comment:4 by madi, 9 years ago

Owner: changed from Madi to grass-dev@…

fwiw, I made some manual calculations in order to establish what the column 'flow_accum' represents. My hypothesis was that it represented the difference between the value of flow accum in the node downstream minus the accum in the node upstream. But my hypothesis was not verified, although the magnitude is comparable. If someone has better ideas I'm ready to test. Thanks

comment:5 by martinl, 8 years ago


comment:6 by neteler, 8 years ago


comment:7 by neteler, 6 years ago


comment:8 by martinl, 5 years ago

Any progress to solve this issue?

comment:9 by martinl, 5 years ago

Milestone: 7.0.7

Remove Milestone from Addons bugreports.

comment:10 by neteler, 5 years ago

Milestone: 7.8.3
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