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    Thank you very much. That was the problem.<br>
    <br>
    Sorry for any inconvenience.<br>
    <br>
    Kind regards.<br>
    <br>
    <br>
    <div class="moz-cite-prefix">El 26/09/14 a las #4, Pedro Palheiro
      escribió:<br>
    </div>
    <blockquote
cite="mid:CAPOo6OfjvFg6pd2ZCWO5k63JiE=bXn_dbcsOAWBto_T7jYyG8g@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_default" style="font-family:tahoma,sans-serif">Hello
          Luis,<br>
          <br>
        </div>
        <div class="gmail_default" style="font-family:tahoma,sans-serif">Maybe
          it is a coordinate reference system problem? It looks like
          you're using wgs84 for the input and coordinates, and
          requesting the calculation in meters (obs_elev, tgt_elev and
          max_dist). Try to change the CRS to see if it works.<br>
          <br>
          r.viewshed -b input=Portada@inisig output=visPort<br>
          <b>coordinates=-3.74034324324,42.5352702703</b> <br>
          obs_elev=9 tgt_elev=1.75<br>
          <div id=":tc" class="">
            max_dist=30000<br>
            Computing events...<br>
            Computing visibility...<br>
            r.viewshed: statusstructure.cpp:73: float<br>
            get_vertical_angle(Viewpoint, StatusNode, surface_type,<br>
            int): La declaraci?n `<b>fabs(sn.dist2vp) > 0.001</b>' no
            se<br>
            cumple.</div>
          <br>
        </div>
        <div class="gmail_default" style="font-family:tahoma,sans-serif">Adios,<br>
        </div>
        <div class="gmail_default" style="font-family:tahoma,sans-serif">Pedro
          Palheiro<br>
        </div>
        <div class="gmail_default" style="font-family:tahoma,sans-serif"><br>
        </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">2014-09-25 20:00 GMT+01:00 <span
              dir="ltr"><<a moz-do-not-send="true"
                href="mailto:grass-user-request@lists.osgeo.org"
                target="_blank">grass-user-request@lists.osgeo.org</a>></span>:<br>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
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              Today's Topics:<br>
              <br>
                 1. Re: removing small lines (Markus Neteler)<br>
                 2. Problems with r.viewshed (Luis Miguel Royo P?rez)<br>
                 3. Re: Problems with r.viewshed (Markus Neteler)<br>
                 4. Re: Problems with r.viewshed (Luis Miguel Royo
              P?rez)<br>
              <br>
              <br>
----------------------------------------------------------------------<br>
              <br>
              Message: 1<br>
              Date: Thu, 25 Sep 2014 10:25:25 +0200<br>
              From: Markus Neteler <<a moz-do-not-send="true"
                href="mailto:neteler@osgeo.org">neteler@osgeo.org</a>><br>
              To: Levente Juh?sz <<a moz-do-not-send="true"
                href="mailto:jlevente89@gmail.com">jlevente89@gmail.com</a>><br>
              Cc: GRASS user list <<a moz-do-not-send="true"
                href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
              Subject: Re: [GRASS-user] removing small lines<br>
              Message-ID:<br>
                      <CALFmHhsJtJ0-=<a moz-do-not-send="true"
                href="mailto:me%2BC_8o6%2BY9CTA1P-cofD3NemuyE30uBmvF5Q@mail.gmail.com">me+C_8o6+Y9CTA1P-cofD3NemuyE30uBmvF5Q@mail.gmail.com</a>><br>
              Content-Type: text/plain; charset=UTF-8<br>
              <br>
              On Wed, Sep 24, 2014 at 4:22 PM, Levente Juh?sz <<a
                moz-do-not-send="true"
                href="mailto:jlevente89@gmail.com">jlevente89@gmail.com</a>>
              wrote:<br>
              > Hi all,<br>
              ><br>
              > I've seen that the remove_small method of
              v.generalize has been eliminated.<br>
              > Reduction method does not work in the way I want
              since it just removes point<br>
              > from lines and it seems like has no effect on a line
              of 2 points - even if<br>
              > they're smaller than the threshold.<br>
              > Can someone tell me what the workaround is for
              removing small lines from a<br>
              > vector for example by a threshold in map units?<br>
              <br>
              <br>
              You may use v.to.db and option=length (line length), then
              use<br>
              v.extract to extract into a new map according to a
              threshold you need.<br>
              <br>
              Markus<br>
              <br>
              <br>
              ------------------------------<br>
              <br>
              Message: 2<br>
              Date: Thu, 25 Sep 2014 10:35:52 +0200<br>
              From: Luis Miguel Royo P?rez <<a moz-do-not-send="true"
                href="mailto:luis.miguel.royo@gmail.com">
                <div class="gmail_default"
                  style="font-family:tahoma,sans-serif;display:inline">​
                  ​</div>
                luis.miguel.royo@gmail.com</a>><br>
              To: <a moz-do-not-send="true"
                href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>
              Subject: [GRASS-user] Problems with r.viewshed<br>
              Message-ID: <<a moz-do-not-send="true"
                href="mailto:5423D3E8.5090206@gmail.com">5423D3E8.5090206@gmail.com</a>><br>
              Content-Type: text/plain; charset="utf-8"; Format="flowed"<br>
              <br>
              Hi everyone,<br>
              <br>
              when I try to run r.viewshed the output shows me this:<br>
              <br>
              Nodata value set to -nan<br>
              rows=198, cols=217, total = 42966<br>
              In-memory memory usage is 4298336 B (4 MB),           
               max mem<br>
              allowed=524288000 B(500MB)<br>
              *****  IN_MEMORY MODE  *****<br>
              Start sweeping.<br>
              Computing events ...<br>
              Sorting events...<br>
              Terminado.<br>
              Determine visibility...<br>
              r.viewshed: statusstructure.cpp:73: float<br>
              get_vertical_angle(Viewpoint, StatusNode, surface_type,<br>
              int): La declaraci?n `fabs(sn.dist2vp) > 0.001' no se<br>
              cumple.<br>
              <br>
              Anyone has a clue about what it could be happening?<br>
              <br>
              I'm using GRASS 6.4.4 in Xubuntu 14.04.<br>
              <br>
              I think I must say that a few days ago I installed GRASS 7
              but I removed<br>
              it and reinstalled GRASS 6.4.4. Maybe is there any
              incompatibility?<br>
              <br>
              <br>
              Thanks a lot!!!<br>
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              <br>
              ------------------------------<br>
              <br>
              Message: 3<br>
              Date: Thu, 25 Sep 2014 12:46:13 +0200<br>
              From: Markus Neteler <<a moz-do-not-send="true"
                href="mailto:neteler@osgeo.org">neteler@osgeo.org</a>><br>
              To: Luis Miguel Royo P?rez <<a moz-do-not-send="true"
                href="mailto:luis.miguel.royo@gmail.com">luis.miguel.royo@gmail.com</a>><br>
              Cc: GRASS user list <<a moz-do-not-send="true"
                href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
              Subject: Re: [GRASS-user] Problems with r.viewshed<br>
              Message-ID:<br>
                      <CALFmHhuPb4w+S03JwMEohU0yQaUas+0f65R=<a
                moz-do-not-send="true"
                href="mailto:sVaXsFFEOaTALg@mail.gmail.com">sVaXsFFEOaTALg@mail.gmail.com</a>><br>
              Content-Type: text/plain; charset=UTF-8<br>
              <br>
              On Thu, Sep 25, 2014 at 10:35 AM, Luis Miguel Royo P?rez<br>
              <<a moz-do-not-send="true"
                href="mailto:luis.miguel.royo@gmail.com">luis.miguel.royo@gmail.com</a>>
              wrote:<br>
              > Hi everyone,<br>
              ><br>
              > when I try to run r.viewshed the output shows me
              this:<br>
              <br>
              (in GRASS 6 it is an Addon)<br>
              <br>
              > Nodata value set to -nan<br>
              > rows=198, cols=217, total = 42966<br>
              > In-memory memory usage is 4298336 B (4 MB),         
                 max mem<br>
              > allowed=524288000 B(500MB)<br>
              > *****  IN_MEMORY MODE  *****<br>
              > Start sweeping.<br>
              > Computing events ...<br>
              > Sorting events...<br>
              > Terminado.<br>
              > Determine visibility...<br>
              > r.viewshed: statusstructure.cpp:73: float<br>
              > get_vertical_angle(Viewpoint, StatusNode,
              surface_type,<br>
              > int): La declaraci?n `fabs(sn.dist2vp) > 0.001' no
              se<br>
              > cumple.<br>
              ><br>
              > Anyone has a clue about what it could be happening?<br>
              ><br>
              > I'm using GRASS 6.4.4 in Xubuntu 14.04.<br>
              <br>
              I have backported some fixes from GRASS 7 to the addon in
              GRASS 6.<br>
              Please reinstall the addon with g.extension and try again.<br>
              <br>
              > I think I must say that a few days ago I installed
              GRASS 7 but I removed it<br>
              > and reinstalled GRASS 6.4.4. Maybe is there any 
              incompatibility?<br>
              <br>
              No, GRASS 6 and 7 can happily live together.<br>
              <br>
              Please let us know if the updated Addon runs ok for you.<br>
              <br>
              Markus<br>
              <br>
              <br>
              ------------------------------<br>
              <br>
              Message: 4<br>
              Date: Thu, 25 Sep 2014 14:11:36 +0200<br>
              From: Luis Miguel Royo P?rez <<a moz-do-not-send="true"
                href="mailto:luis.miguel.royo@gmail.com">luis.miguel.royo@gmail.com</a>><br>
              To: Markus Neteler <<a moz-do-not-send="true"
                href="mailto:neteler@osgeo.org">neteler@osgeo.org</a>><br>
              Cc: GRASS user list <<a moz-do-not-send="true"
                href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
              Subject: Re: [GRASS-user] Problems with r.viewshed<br>
              Message-ID: <<a moz-do-not-send="true"
                href="mailto:54240678.7060005@gmail.com">54240678.7060005@gmail.com</a>><br>
              Content-Type: text/plain; charset="utf-8"; Format="flowed"<br>
              <br>
              I'm sorry but it didn't work.<br>
              <br>
              I have reinstalled the addon but it didn't work,
              reinstalled GRASS 6.4<br>
              and neither, then installed GRASS7 again, and appears this
              message:<br>
              <br>
              r.viewshed -b input=Portada@inisig output=visPort<br>
              coordinates=-3.74034324324,42.5352702703 obs_elev=9
              tgt_elev=1.75<br>
              max_dist=30000<br>
              Computing events...<br>
              Computing visibility...<br>
              r.viewshed: statusstructure.cpp:73: float<br>
              get_vertical_angle(Viewpoint, StatusNode, surface_type,<br>
              int): La declaraci?n `fabs(sn.dist2vp) > 0.001' no se<br>
              cumple.<br>
              <br>
              <br>
              I will try in another PC.<br>
              <br>
              Thank you for your time.<br>
              <br>
              El 25/09/14 a las #4, Markus Neteler escribi?:<br>
              > On Thu, Sep 25, 2014 at 10:35 AM, Luis Miguel Royo
              P?rez<br>
              > <<a moz-do-not-send="true"
                href="mailto:luis.miguel.royo@gmail.com">luis.miguel.royo@gmail.com</a>>
              wrote:<br>
              >> Hi everyone,<br>
              >><br>
              >> when I try to run r.viewshed the output shows me
              this:<br>
              > (in GRASS 6 it is an Addon)<br>
              ><br>
              >> Nodata value set to -nan<br>
              >> rows=198, cols=217, total = 42966<br>
              >> In-memory memory usage is 4298336 B (4 MB),     
                     max mem<br>
              >> allowed=524288000 B(500MB)<br>
              >> *****  IN_MEMORY MODE  *****<br>
              >> Start sweeping.<br>
              >> Computing events ...<br>
              >> Sorting events...<br>
              >> Terminado.<br>
              >> Determine visibility...<br>
              >> r.viewshed: statusstructure.cpp:73: float<br>
              >> get_vertical_angle(Viewpoint, StatusNode,
              surface_type,<br>
              >> int): La declaraci?n `fabs(sn.dist2vp) >
              0.001' no se<br>
              >> cumple.<br>
              >><br>
              >> Anyone has a clue about what it could be
              happening?<br>
              >><br>
              >> I'm using GRASS 6.4.4 in Xubuntu 14.04.<br>
              > I have backported some fixes from GRASS 7 to the
              addon in GRASS 6.<br>
              > Please reinstall the addon with g.extension and try
              again.<br>
              ><br>
              >> I think I must say that a few days ago I
              installed GRASS 7 but I removed it<br>
              >> and reinstalled GRASS 6.4.4. Maybe is there any 
              incompatibility?<br>
              > No, GRASS 6 and 7 can happily live together.<br>
              ><br>
              > Please let us know if the updated Addon runs ok for
              you.<br>
              ><br>
              > Markus<br>
              <br>
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              <br>
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              End of grass-user Digest, Vol 101, Issue 39<br>
              *******************************************<br>
            </blockquote>
          </div>
          <br>
          <br clear="all">
          <br>
          -- <br>
          <div>Pedro Palheiro</div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>