[Therion] Overlay grid over maps

[Martin Sluka]

Try to modify the MetaPost code for sump?

m.s.

On Sep 27, 2017, at 11:44 AM, Andrew Atkinson via Therion <therion at speleo.sk> wrote:

I've not used it myself but there is an option

grid-angle <value> <units> ▷ specifies the magnetic grid angle
(declination against grid north).

page 19 of the thbook for details

Andrew


On 25/09/17 06:12, Steven Tucker via Therion wrote:
Good day everyone,

I am in the process of remapping a large cave in which there are various
archaeological / paleontological excavation areas.

In one chamber of the cave an excavation grid has been setup. The
excavation grid's north is 23 degrees east of true north. Magnetic north
is 18 degrees west of true north.

So if I put "grid bottom" into my layout I get a grid on my pdf output
which is oriented to magnetic north.

Is there a way to orientate this grid to 23 degrees east of true north?

Thanks,

Steven


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