<html><head></head><body bgcolor="#FFFFFF"><div>Hi bruce</div><div><br></div><div>My solution to this problem is to equates the two fixed stations to a third one which is not fixed</div><div><br></div><div>Xavier<br><br>Envoyé de mon iPhone</div><div><br>Le 1 janv. 2012 à 01:44, Bruce <<a href="mailto:bruce@tomo.co.nz">bruce@tomo.co.nz</a>> a écrit :<br><br></div><div></div><blockquote type="cite"><div>
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<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">Happy New Year!<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">I’ve just tried to equate some fixed stations
that have been defined a bit like this;<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">fix 809 2502023 6021519
594 4 4 12<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">but I get errors from therion like this;<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">error -- equate of two fixed stations --
<a href="mailto:809@NSpots.NgaruaArea">809@NSpots.NgaruaArea</a> and <a href="mailto:A1@a.Kairuru.NgaruaArea">A1@a.Kairuru.NgaruaArea</a><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">These represent gps fixes taken at the same place on
various occasions and part of various overland surveys.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">At first look it seems like this might be a desired
response from Therion. How can two stations with specified and differing
co-ordinates be ‘equal’?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">My assumption was that the standard errors give the
actual position of the station a degree of uncertainty or
‘fuzzyness’, and that by equating two such stations they would be
‘averaged out’ in a similar way to loop closures or two fixed
stations connected by a survey network. But it seems I might have assumed
wrong.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">Is it part of therions design to allow equating a
number of fixed stations? <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">By using alternative syntax or connecting the
stations with a dummy survey leg with large std error perhaps?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial">Bruce<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Arial"><span lang="EN-NZ" style="font-size:
10.0pt;font-family:Arial"><o:p> </o:p></span></font></p>
</div>
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