If declination is explicitly specified for centerline, automatic declination is turned off.<div><br></div><div>The reason, why you have a rotated map is probably &quot;meridian convergence&quot;. I am not an expert in this topic, but coordinate system north is usually also rotated against true astronomical north.</div>

<div><br></div><div>Have you played with layout north settings? E.g. include:</div><div><br></div><div>north grid</div><div><br></div><div>in the layout? Are you able to measure somehow this artificial rotation? Therion in its output reports both - calculated magnetic declination and meridian convergence for cave area.</div>

<div><br></div><div>Another question? Do you measure declination against true (astronomical) or grid north?</div><div><br></div><div>S.</div><div><br></div><div><div class="gmail_quote">On 3 October 2012 13:54, John Stevens <span dir="ltr">&lt;<a href="mailto:john@k-stevens.co.uk" target="_blank">john@k-stevens.co.uk</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div dir="ltr">
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<div>It seems the cs command over writes any declination that has been set, 
using the date provided with the survey data.</div>
<div> </div>
<div>I have a large batch of old data with some accurate local declinations 
given. Unfortunately these are overridden so I can’t compare my results with the 
original results.</div>
<div>How can I make sure my local declinations are used rather than the cs 
global declination.</div>
<div> </div>
<div>Another problem on the same line. I have a set of data where the 
declination has been taken off the bearings, so the local declination is now 0 
degrees but the cs command still adds a declination, moving it way out from its 
expected line.</div>
<div> </div>
<div>Can we have therion having a priority for local declinations rather than 
the gobal cs delinations ?</div><span class="HOEnZb"><font color="#888888">
<div> </div>
<div>John</div>
<div> </div></font></span></div></div></div>
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