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List: grass-user
Subject: Re: [GRASS-user] Flow line [r.flow]
From: Valter Albino <valteralbino () gmail ! com>
Date: 2020-01-31 13:59:50
Message-ID: CANPyY5MNCmV8qKDoF3njY4H=yG+HZLyG2AMDAJJqCCXN6bKP7g () mail ! gmail ! com
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Hi,
It's done, running from GRASS GIS 7.8.2 GUI, in a Windows 64bits OS.
There ares differences when simulating for small areas or bigger areas,
with default options.
When testing for bigger areas I wasn't setting the number of cells bettween
flowlines & maximum number of segments per flowline.
Thanks
Cumprimentos,
*Valter Albino -* Ge=C3=B3grafo F=C3=ADsico, M.Sc.
Modela=C3=A7=C3=A3o H&H / Riscos ambientais / OT&U
www.valteralbino.wixsite.com/hydrodynamics
Valter Albino <valteralbino@gmail.com> escreveu no dia quinta, 30/01/2020
=C3=A0(s) 09:55:
> Hi Huidae
> Yes, the purple and black lines flow lines. Wondering if using units in
> "cm", instead of "m" gives correct results (the online manual sais that, =
i
> suppose) in terms of: more number and length of flow lines.
> Using r.flow (https://grass.osgeo.org/grass78/manuals/r.flow.html) with
> the following raster file:
> [image: image.png]
> Sorry to moderator (sent 2 files with extra weight)
>
> Cumprimentos,
> *Valter Albino -* Ge=C3=B3grafo F=C3=ADsico, M.Sc.
> Modela=C3=A7=C3=A3o H&H / Riscos ambientais / OT&U
> www.valteralbino.wixsite.com/hydrodynamics
>
>
> Huidae Cho <grass4u@gmail.com> escreveu no dia ter=C3=A7a, 28/01/2020 =C3=
=A0(s)
> 02:56:
>
>> Valter,
>>
>> Which module did you use to generate flow lines? It wouldn't be easy to
>> troubleshoot your problem without sample data and detail steps. Are thos=
e
>> purple and black lines flow lines?
>>
>> Best,
>> Huidae
>>
>>
>>
>> On Wed, Jan 15, 2020 at 3:58 PM Valter Albino <valteralbino@gmail.com>
>> wrote:
>>
>>> Is it normal results, scattered flow lines in a landscape with
>>> altimetric amplitude of 50 to 60 meters (see following image). Is it an
>>> erratic result?
>>>
>>>
>>> [image: imagem.gif]
>>>
>>> Cumprimentos,
>>> *Valter Albino -* Ge=C3=B3grafo F=C3=ADsico, M.Sc.
>>> Modela=C3=A7=C3=A3o H&H / Riscos ambientais / OT&U
>>> www.valteralbino.wixsite.com/hydrodynamics
>>> _______________________________________________
>>> grass-user mailing list
>>> grass-user@lists.osgeo.org
>>> https://lists.osgeo.org/mailman/listinfo/grass-user
>>
>>
>>
>> --
>> Huidae Cho, Ph.D., GISP
>> GRASS GIS Developer
>> https://idea.isnew.info
>>
>
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<div dir="ltr">Hi,<div><br></div><div>It's done, running from GRASS GIS 7.8.2 \
GUI, in a Windows 64bits OS.</div><div>There ares differences when simulating for \
small areas or bigger areas, with default options.<br>When testing for bigger areas I \
wasn't setting the number of cells bettween flowlines & maximum number of \
segments per flowline.</div><div>Thanks</div><div><br></div><div><div dir="ltr" \
class="gmail_signature" data-smartmail="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 FÃsico, \
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></s \
pan><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div \
class="gmail_quote"><div dir="ltr" class="gmail_attr">Valter Albino <<a \
href="mailto:valteralbino@gmail.com">valteralbino@gmail.com</a>> escreveu no dia \
quinta, 30/01/2020 Ã (s) 09:55:<br></div><blockquote class="gmail_quote" \
style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><span \
style="color:rgb(80,0,80)">Hi Huidae</span><div style="color:rgb(80,0,80)"><span \
style="color:rgb(34,34,34)">Yes, the purple and black lines flow lines. Wondering if \
using units in "cm", instead of "m" gives correct results (the \
online manual sais that, i suppose) in terms of: more number and length of flow \
lines.</span> <br></div><div style="color:rgb(80,0,80)">Using r.flow (<a \
href="https://grass.osgeo.org/grass78/manuals/r.flow.html" \
target="_blank">https://grass.osgeo.org/grass78/manuals/r.flow.html</a>) with the \
following raster file:</div></div><div><div><img src="cid:ii_k60kacqs1" \
alt="image.png" width="539" height="290"><br></div></div><div>Sorry to moderator \
(sent 2 files with extra weight)</div><br clear="all"><div><div dir="ltr"><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 FÃsico, \
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></s \
pan><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div \
class="gmail_quote"><div dir="ltr" class="gmail_attr">Huidae Cho <<a \
href="mailto:grass4u@gmail.com" target="_blank">grass4u@gmail.com</a>> escreveu no \
dia terça, 28/01/2020 à (s) 02:56:<br></div><blockquote class="gmail_quote" \
style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div \
dir="ltr"><div>Valter,</div><div><br></div><div>Which module did you use to generate \
flow lines? It wouldn't be easy to troubleshoot your problem without sample data \
and detail steps. Are those purple and black lines flow \
lines?</div><div><br></div><div>Best,</div><div>Huidae<br></div><div><br></div><div><br></div></div><br><div \
class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 15, 2020 at 3:58 PM \
Valter Albino <<a href="mailto:valteralbino@gmail.com" \
target="_blank">valteralbino@gmail.com</a>> wrote:<br></div><blockquote \
class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>Is it normal \
results, scattered flow lines in a landscape with altimetric amplitude of 50 to 60 \
meters (see following image). Is it an erratic \
result?</div><div><br></div><div><br></div><div><div><img src="cid:ii_k5fsachr1" \
alt="imagem.gif" width="522" height="492"></div><div><br></div></div><div><div \
dir="ltr"><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 FÃsico, \
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></s \
pan><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
_______________________________________________<br>
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target="_blank">grass-user@lists.osgeo.org</a><br> <a \
href="https://lists.osgeo.org/mailman/listinfo/grass-user" rel="noreferrer" \
target="_blank">https://lists.osgeo.org/mailman/listinfo/grass-user</a></blockquote></div><br \
clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div \
dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span><div><div dir="ltr">Huidae \
Cho, Ph.D., GISP</div><div dir="ltr">GRASS GIS Developer</div><div><a \
href="https://idea.isnew.info" \
target="_blank">https://idea.isnew.info</a><br></div></div></span></div></div></div></div></div></div></div></div></div></div>
</blockquote></div>
</blockquote></div>
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