<div dir="ltr"><div dir="ltr">Hi Stefan<br><div><br></div><div>Thanks for the answer.<br></div><div>I tested in GRASS, but the results are not as expected. Selected the upstream calculation method and didn't marked any option (optional tab). The vertical distance from stream to ridge line is not good and the crest of the valley is not correct. I did tested with SAGA the vertical distance from stream to ridge line along the watercourse and validated it manually (see image bellow).<br></div><div><br></div><div><div><img src="cid:ii_k8wax98v0" alt="imagem.png" width="520" height="348"><br></div></div><div><br></div><div>In GRASS, the addon says:</div><div>(...)<br></div><div>difference<br> Name of output map of elevation difference to the target (outlet, node, stream, divide, maximum) along watercourse. The map is of DCELL type.<br>distance<br> Name of output map of distance to the target (outlet, node, stream, divide, maximum) along watercourse. The map is of DCELL type.<br></div><div>(...)</div><div>I thought that should it be possible to select the distance and difference from the stream to the divide (ridge line).</div><div>Well, it would be great if GRASS can do it.<br></div><div><br clear="all"><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><span style="color:rgb(0,0,0)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif">Cumprimentos,</span></span></font></span><b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><br>Valter Albino -</span></span></font></span></b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><b> </b>Geógrafo Físico, M.Sc.<span></span><span></span></span></span></font></span><b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"></span></span></font></span></b><br><b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"></span></span></font></span></b></div></div><div><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif">Modelação H&H / </span><span style="font-family:arial,helvetica,sans-serif">Riscos ambientais / OT&U<br></span></span></font></span></div><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><a href="http://www.valteralbino.wixsite.com/hydrodynamics" target="_blank">www.valteralbino.wixsite.com/hydrodynamics</a></span></span></font></span><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Stefan Blumentrath <<a href="mailto:Stefan.Blumentrath@nina.no">Stefan.Blumentrath@nina.no</a>> escreveu no dia sábado, 11/04/2020 à(s) 22:57:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Hi Valter,</div>
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please have a look at:</div>
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<a href="https://grass.osgeo.org/grass78/manuals/addons/r.stream.distance.html" id="gmail-m_-7440487982115066301LPlnk988318" target="_blank">https://grass.osgeo.org/grass78/manuals/addons/r.stream.distance.html</a></div>
<div id="gmail-m_-7440487982115066301LPBorder_GTaHR0cHM6Ly9ncmFzcy5vc2dlby5vcmcvZ3Jhc3M3OC9tYW51YWxzL2FkZG9ucy9yLnN0cmVhbS5kaXN0YW5jZS5odG1s" style="width:100%;margin-top:16px;margin-bottom:16px;max-width:800px;min-width:424px">
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<a id="gmail-m_-7440487982115066301LPUrlAnchor455461" href="https://grass.osgeo.org/grass78/manuals/addons/r.stream.distance.html" style="text-decoration:none" target="_blank">r.stream.distance - GRASS GIS manual</a></div>
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NAME r.stream.distance - Calculates distance to and elevation above streams and outlet. The module can work in stream mode where target are streams and outlets mode where targets are outlets. KEYWORDS raster, hydrology, stream network, watercourse distance
SYNOPSIS</div>
<div id="gmail-m_-7440487982115066301LPMetadata455461" style="font-size:14px;font-weight:400;color:rgb(166,166,166);font-family:"wf_segoe-ui_normal","Segoe UI","Segoe WP",Tahoma,Arial,sans-serif">
<a href="http://grass.osgeo.org" target="_blank">grass.osgeo.org</a></div>
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However, it is an addon. So it is - unfortunately - not necessarily straight forward to integrate it into your workflows (I understood you use GRASS from QGIS). At least in the processing framework you would need a workaround.</div>
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Hope that helps a bit never the less.<br>
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Cheers</div>
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Stefan<br>
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<div id="gmail-m_-7440487982115066301divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>Fra:</b> grass-user <<a href="mailto:grass-user-bounces@lists.osgeo.org" target="_blank">grass-user-bounces@lists.osgeo.org</a>> på vegne av Valter Albino <<a href="mailto:valteralbino@gmail.com" target="_blank">valteralbino@gmail.com</a>><br>
<b>Sendt:</b> lørdag 11. april 2020 23:18<br>
<b>Til:</b> grass-user <<a href="mailto:grass-user@lists.osgeo.org" target="_blank">grass-user@lists.osgeo.org</a>><br>
<b>Emne:</b> [GRASS-user] Geomorphic index for valley, using "height of the valley / width of the top of the valley"</font>
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<div dir="ltr">Hi all<br>
I would like to calculate a geomorphic index for valley, using the following equation: height of the valley / width of the top of the valley - the higher the index values, the greater the notch (carve in the landscape) in the valley.<br>
I found that SAGA gives the "Vertical distance to the channel network".<br>
Does GRASS have a function to calculate each ot the two input?<br>
Thanks in advance<br>
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<div><span style="color:rgb(0,0,0)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif">Cumprimentos,</span></span></font></span><b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><br>
Valter Albino -</span></span></font></span></b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><b>
</b>Geógrafo Físico, M.Sc.<span></span><span></span></span></span></font></span><b><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"></span></span></font></span></b><br>
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<div><span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif">Modelação H&H /
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<span style="color:rgb(39,78,19)"><font size="1"><span style="background-color:rgb(255,255,255)"><span style="font-family:arial,helvetica,sans-serif"><a href="http://www.valteralbino.wixsite.com/hydrodynamics" target="_blank">www.valteralbino.wixsite.com/hydrodynamics</a></span></span></font></span><br>
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