[Therion] symbol-show fixed points

[Stacho Mudrak]

Well, it is quite complicated, but it is possible. When point symbol is
exported from centerline, system _text attribute is set in metapost. To
dipsplay label, use code

code metapost
  def p_continuation(expr pos,theta,sc,al) =

etc...

shown in:

http://therion.speleo.sk/samples.doc/60.html

But you will need to redefine corresponding symbol (e.g. p_sink). In that
code, you can also control, whether symbol and/or text should be displayed.
Feel free to ask more, if this does not help you.

Regards, S.

On 7 February 2011 21:10, Bruce <dangle at tomo.co.nz> wrote:

>  Hi All
>
> I’ve been trying to understand symbol-show and symbol-hide a little better
> as they relate to pdf outputs.  How do I display the text associated with
> fixed points?
>
>
>
> I have some map objects defined for various caves in a large system.  These
> are comprised of scrap drawings.
>
>
>
>  I also have a map object with the minor surface features nearby, such as
> sinks, dolines, isolated entrances and significant navigational features
> such as fence posts or trees (for example). This is comprised of a survey
> only (mostly fixed points, and no scrap drawings) however and uses flags
> such as doline or sink, and most points have a text string associated ie.
>
>
>
> fix 15 2521640   6042938            581       10 10 30
>
> station 15 "Concrete water trough"
>
>
>
> I would like to show the caves as outlines with all the rest of their
> symbology turned off, and the surface features with each of the points
> labelled with appropriate symbol and associated text.  This is for an area
> map, at scales of say 1:5000 or 1:10,000
>
> I can turn the cave symbols off with symbol-hide statements, and so far I
> think that is working out OK.
>
>
>
> However…
>
>
>
>             -layout-symbol-show point flag:entrance \
>
>             -layout-symbol-show point flag:sink \
>
>             -layout-symbol-show point flag:spring \
>
>             -layout-symbol-show point flag:doline \
>
>             -layout-symbol-show point flag:dig \
>
> The above layout statements cause the special entrance and sink etc symbols
> to be displayed, AND show the text string associated with the point.  These
> are not displayed by default as far as I can tell, but these statements
> rectify that.
>
>         -layout-symbol-show group all
>
> And the group all statement has pretty much the same effect in a more
> comprehensive and compact format.
>
>
>
> However none of the above enables me to display the text for my “Concrete
> water trough” example above.
>
> It is always just a cross with no text, or with ‘15’ if debug station-names
> is on.  It shows up in Loch, but not in pdfs.
>
>
>
> So, how do I display the text associated with fixed points?
>
> Is there a need for…
>
>             -layout-symbol-show point fixed
>
> … or something similar?
>
>
>
> Also, sometimes I would like to display the point symbols (for the likes of
> the above flags) OR the text strings associated with the points, but not
> both at once.  Is there a way of doing this?
>
>
>
> Thanks
>
> Bruce
>
>
>
>
>
>
>
>
>
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>
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