If declination is explicitly specified for centerline, automatic declination is turned off. The reason, why you have a rotated map is probably "meridian convergence". I am not an expert in this topic, but coordinate system north is usually also rotated against true astronomical north. Have you played with layout north settings? E.g. include: north grid 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. Another question? Do you measure declination against true (astronomical) or grid north? S. On 3 October 2012 13:54, John Stevens <john@k-stevens.co.uk> wrote:
It seems the cs command over writes any declination that has been set, using the date provided with the survey data.
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. How can I make sure my local declinations are used rather than the cs global declination.
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.
Can we have therion having a priority for local declinations rather than the gobal cs delinations ?
John
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