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Could it be that it comes from cs specifications in the same
centerline environment?<br>
<br>
I have been using multiple datums (e.g lat-long, UTM, old and new
lambert coordinate systems for France) for fixing coordinates in a
system of multiple caves without any problem. However, I believe
that I have a single cs statement per centerline. Indeed, at some
point I discovered that the equal statements were now working
properly outside the centerline environment, so that I centerlined
individually all my pieces of survey, even in the same survey.<br>
<br>
My 2 bits<br>
<br>
Xavier<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Le 19/09/2014 23:10, Bruce a écrit :<br>
</div>
<blockquote cite="mid:6A7275A132B647069E5D1942984A272A@JUICEBRAIN"
type="cite">
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<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">We have been
using multiple coordinate systems for a number of years, and
it seems to work perfectly.</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">We mix and
match at will between lat-long, NZMG and NZTM (ie old and
new datums) within the same cave survey and between cave
surveys.</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">So, Footleg,
unless you have other reasons to do so, there is no need to
convert your old datum coords to new datum coords.</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014"></span></font> </div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">There seem to
be a couple of rules to keep things working smoothly. Have
a look at Therion Book pg 14 and 46-47 and k</span></font><font
face="Arial" size="2" color="#0000ff"><span
class="671242920-19092014">eep in mind the distinction
between input and output. </span></font></div>
<span class="671242920-19092014">
<ol dir="ltr">
<li>
<div align="left"><font face="Arial"><font color="#0000ff"><font
size="2"><span class="671242920-19092014">E</span>ach
centerline with fix statement(s) should have a date
and cs specification (prior to the fix I think).</font></font></font></div>
</li>
<li>
<div align="left"><font face="Arial" size="2"
color="#0000ff">So that you can be sure of the cs
applied to the outputs, specify the output cs that you
want in the th-config (not in a layout).</font></div>
</li>
<li>
<div align="left"><span class="671242920-19092014"><font
face="Arial" size="2" color="#0000ff">I have avoided
using cs in layout, as, even if Therion is consistent
in the way it applies it, in the situation where there
are multiple coordinate systems in use, it is not
abundantly clear to a user which cs will be used, for
example where some centrelines have no explicit cs or
for the output. (Although reading Therion Book pg 47,
maybe that is for Atlas outputs - been a while, I
forget).</font></span></div>
</li>
</ol>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">Now that we
have output variables in 5.3.15 that echo the cs that has
been used for output, it will be possible to have this
stamped in the pdf header. I have a 'proof that it works'
layout drafted up, and one day I will make a modular set
of layouts to make it readily useable</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014"></span></font> </div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">The first
file embedded on this page <a moz-do-not-send="true"
href="http://therion.speleo.sk/wiki/doku.php/templates">http://therion.speleo.sk/wiki/doku.php/templates</a></span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">(ie </span></font><font
face="Arial" size="2" color="#0000ff"><span
class="671242920-19092014"><a moz-do-not-send="true"
href="http://therion.speleo.sk/wiki/lib/exe/fetch.php/templates:thconfig-templatesimple.txt">http://therion.speleo.sk/wiki/lib/exe/fetch.php/templates:thconfig-templatesimple.txt</a>)</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">shows how I
use it in a th-config file.</span></font></div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014"></span></font> </div>
<div dir="ltr" align="left"><font face="Arial" size="2"
color="#0000ff"><span class="671242920-19092014">Bruce</span></font></div>
<br>
<div dir="ltr" class="OutlookMessageHeader" lang="en-us"
align="left">
<hr tabindex="-1">
<font face="Tahoma" size="2"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:therion-bounces@speleo.sk">therion-bounces@speleo.sk</a> [<a class="moz-txt-link-freetext" href="mailto:therion-bounces@speleo.sk">mailto:therion-bounces@speleo.sk</a>]
<b>On Behalf Of </b>Footleg<br>
<b>Sent:</b> Saturday, 20 September 2014 4:13 a.m.<br>
<b>To:</b> List for Therion users<br>
<b>Subject:</b> Re: [Therion] Combining caves using
different co-ordinate systems<br>
</font><br>
</div>
<p dir="ltr">I had put one cave using a cs and gps fix
coordinates into one survey block in a .th file. Then a second
cave using a different cs and gps fix coordinates in a second
.th file.</p>
<p dir="ltr">My project then uses a <a moz-do-not-send="true"
href="http://master.th">master.th</a> file which inputs both
of these. If I run my config on either of the individual files
then they appear at the correct place on Google Earth from an
output kml file. If I include both caves then they appear in
different places. The one I include first is in the correct
place. If I swap the order they appear in the <a
moz-do-not-send="true" href="http://master.th">master.th</a>
file then this confirms the first one is alway put in the
correct place, and the second is positioned using the cs of
the first one.</p>
<p dir="ltr">The same in a lox model file (except I cannot
confirm which is correct, but I see them in different places
when I give them the same entrance location to test this).</p>
<p dir="ltr">Footleg</p>
<div class="gmail_quote">On 19 Sep 2014 14:33, "Andrew Atkinson"
<<a moz-do-not-send="true"
href="mailto:andrew@wotcc.org.uk">andrew@wotcc.org.uk</a>>
wrote:<br type="attribution">
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px
0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<p dir="ltr">You can use cs in config file, either inside
layout, or outside layout (most likely what you want to
do) to control the output co-ordinate system, which I
think is what you are trying to do?</p>
<p dir="ltr">Andrew</p>
<div class="gmail_quote">On 19 Sep 2014 14:00, "Footleg"
<<a moz-do-not-send="true"
href="mailto:drfootleg@gmail.com" target="_blank">drfootleg@gmail.com</a>>
wrote:<br type="attribution">
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN:
0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class="gmail_quote">I have been converting a project
from an old datum to a more recent<br>
one following the issuing of new maps using the newer
datum. So all my<br>
entrance GPS coordinates changed. I updated the cs
statements in my<br>
survey data files and my KML output is still in the
correct place. So<br>
all was looking good. Then I discovered that if I
include a survey in<br>
the old cs with one using the new cs then Therion
appears to treat<br>
both caves as having the same cs. Whichever cs is used
by the first<br>
included cave is applied to subsequent caves too. Is
there a way to<br>
deal with this?<br>
<br>
Footleg<br>
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