<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">Hello.</span></p><p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;">
<span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB"><br></span></p><p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">I have a problem with the operation r.los in winGrass(native). I have
been testing different maps and when a distance is greater than 80-100 pixels
(map pixels) a system error is thrown.<br> </span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">To put an example, in spearfish data base and the elevation.dem map,
grass fails from 2524m on up<span style=""> </span>(with the
height of the observer set to 1m)</span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">The command would be:</span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">r.los input=elevation.dem output=los coordinate=599505,4921010
max_dis=2525</span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB"> </span></p>
<p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Sans Serif"; color: black;" lang="EN-GB">The error that is reported is a system error: </span><span style="font-size: 10pt; font-family: "MS Shell Dlg";" lang="EN-GB"><br>
</span></p><p class="MsoNormal" style="margin: 0cm 0.9pt 0.0001pt 13.85pt;"><span style="font-size: 10pt; font-family: "MS Shell Dlg";" lang="EN-GB">"r.los.exe there are encountered to problem
and needs to close"</span><span style="" lang="EN-GB"></span></p><br><span style="" lang="EN-GB">Thanks</span><span lang="EN-GB"> </span><span style="" lang="EN-GB">and</span><span lang="EN-GB"> </span><span style="" lang="EN-GB">regards</span>,
<p class="MsoNormal">Gonzalo</p>
<br>