<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">17. 4. 2020 v 21:12, Roger Schuster <<a href="mailto:roger@r-schuster.de" class="">roger@r-schuster.de</a>>:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: 'Segoe UI'; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">To avoid the white artifact (see file kolkhoehle_artifact.pdf) it is necessary<span class="Apple-converted-space"> </span></span><b style="font-family: 'Segoe UI'; font-size: 16px; font-style: normal; font-variant-caps: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">not</b><span style="font-family: 'Segoe UI'; font-size: 16px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class=""><span class="Apple-converted-space"> </span>to hide the survey stations! As soon as you use either the attribute -visibility off or use symbol-hide point station in your layout you will have a white trapezoid on the final pdf map. Only hiding the survey line is possible. As long as the stations are visible the resulting map is fine (see kolkhoehle_ok.pdf). Btw. symbol-hide group cave-centerline causes an error.</span></div></blockquote><br class=""></div><div>As you may see, your .th2 file include only those three stations (and sketch). Probably it is bug in Therion that it not allows to hide stations from the final output. I may imagine the reason - MetaPost works with one scrap in time to interpret and draw that particular scrap. When it has nothing in scrap it will produce error.</div><div><br class=""></div><div>Martin</div><div class=""><br class=""></div><div class=""><img height="141" width="247" apple-width="yes" apple-height="yes" apple-inline="yes" id="6A6C7C03-DF81-4A73-B2AF-1999DE991CE0" src="cid:4366A317-E0ED-4987-8F8E-6133260D3368" class=""></div></body></html>