[Therion] Sketches on doesn't work / legacy survey

[Benoit Martinez]

Hello Roger

if you use the symbol-hide point station, the scrap turn "empty" and the
TeX interpreter seems to be unable to get the size of the map...


if you want hide the stations points, you have to redefine the p_station
macro to do not draw the symbol in your layout :

  code metapost
    def p_station (expr p, m, t)(text flags) = enddef;
  endcode

and if you want to use the "symbol-hide point station", you must add an
object in your scrap, like a "point entrance" or maybe some other object
without outline, but with clip off option

As same way, if you want hide the "artefact" when the survey lines aren't
hidden, just redefine the area dimensions :

code metapost
  def a_dimensions (expr p) = enddef; # don't draw the LRUD enveloppe
endcode

Benoit




*Benoit MARTINEZ - *mz.benoit at gmail.com
<https://www.facebook.com/mz.benoit>
<http://fr.linkedin.com/in/benoitmartinez>


Le ven. 17 avr. 2020 à 21:12, Roger Schuster <roger at r-schuster.de> a écrit :

> Hello cavers,
>
> finally I got it working and now I also can provide a complete example:
>
>
> <https://send.firefox.com/download/68dbfd56e60e2b2c/#iSkNt75QW2_8tIZeDCD9qQ>
> <https://send.firefox.com/download/68dbfd56e60e2b2c/#iSkNt75QW2_8tIZeDCD9qQ>
>
> (link will expire in seven days).
>
> To avoid the white artifact (see file kolkhoehle_artifact.pdf) it is
> necessary *not* 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.
>
> Regards,
>
> Roger
> Am 13.04.2020 um 11:20 schrieb Roger Schuster:
>
> Hello cavers,
>
> currently I try to work with some legacy survey which are the original
> survey data and the final map with scale bar but without marked stations.
> My intention is to geo-reference the existing map (i.e. attaching the
> entrance location to the UTM grid) and use it in a cave atlas of the area.
> I don't want to redraw the whole map in Therion.
>
> I followed the directions given in the therion wiki and entered the survey
> data and the resulting model in Loch looks fine and plausible. After that I
> created a scrap with the scanned map (projection plan) and scaled it using
> the scale bar and the scaling tool of Xtherion map editor. I marked the
> location of the first survey station at the cave entrance and in the layout
> section of my thconfig I turned on sketch export. Unfortunately it doesn't
> work. The generated pdf only contains the map header (with wrong length and
> depth statistics btw!) and a short part of the first survey shot. I expect
> the whole scanned background image to be visible and in scale in the pdf.
> Honestly said I never got the "sketches on" working with any of my old and
> new maps. What I am doing wrong? Any pointer to the right direction is
> highly appreciated.
>
> Best regards and thanks in advance,
>
> Roger
>
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