<html><body><div>Try to modify the MetaPost code for sump?</div><div><br data-mce-bogus="1"></div><div>m.s.</div><div><br>On Sep 27, 2017, at 11:44 AM, Andrew Atkinson via Therion <therion@speleo.sk> wrote:<br><br></div><div><blockquote type="cite"><div class="msg-quote"><div class="_stretch"><span class="body-text-content">I've not used it myself but there is an option<br><br> grid-angle <value> <units> ▷ specifies the magnetic grid angle<br>(declination against grid north).<br><br>page 19 of the thbook for details<br><br>Andrew<br><br><br>On 25/09/17 06:12, Steven Tucker via Therion wrote:<br><blockquote type="cite" class="quoted-plain-text">Good day everyone,</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">I am in the process of remapping a large cave in which there are various</blockquote><blockquote type="cite" class="quoted-plain-text">archaeological / paleontological excavation areas.</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">In one chamber of the cave an excavation grid has been setup. The</blockquote><blockquote type="cite" class="quoted-plain-text">excavation grid's north is 23 degrees east of true north. Magnetic north</blockquote><blockquote type="cite" class="quoted-plain-text">is 18 degrees west of true north.</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">So if I put "grid bottom" into my layout I get a grid on my pdf output</blockquote><blockquote type="cite" class="quoted-plain-text">which is oriented to magnetic north.</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">Is there a way to orientate this grid to 23 degrees east of true north?</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">Thanks,</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">Steven</blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote><blockquote type="cite" class="quoted-plain-text">_______________________________________________</blockquote><blockquote type="cite" class="quoted-plain-text">Therion mailing list</blockquote><blockquote type="cite" class="quoted-plain-text"><a href="mailto:Therion@speleo.sk" data-mce-href="mailto:Therion@speleo.sk">Therion@speleo.sk</a></blockquote><blockquote type="cite" class="quoted-plain-text"><a href="https://mailman.speleo.sk/listinfo/therion" data-mce-href="https://mailman.speleo.sk/listinfo/therion">https://mailman.speleo.sk/listinfo/therion</a></blockquote><blockquote type="cite" class="quoted-plain-text"><br></blockquote>_______________________________________________<br>Therion mailing list<br><a href="mailto:Therion@speleo.sk" data-mce-href="mailto:Therion@speleo.sk">Therion@speleo.sk</a><br><a href="https://mailman.speleo.sk/listinfo/therion" data-mce-href="https://mailman.speleo.sk/listinfo/therion">https://mailman.speleo.sk/listinfo/therion</a><br></span></div></div></blockquote></div></body></html>