[Therion] Multi-level cave - offset the levels

[Bill Gee]

Hi, Bruce - Dang, you're caving and I am stuck in front of the computer!  

Thanks for the tip on the offset.  It took me a bit, but I got it to work.

Bill Gee


On Thursday 25 February 2010 00:33:32 Bruce wrote:
> >Question one:  I am working on a map of a cave which has a maze section. 
> > I
> >
> >would like to compile the map so that the bottom level is connected to the
> >est of the cave while the top level is offset to one side.  How is that
> >one?
> 
> Bill
> A quick and perhaps inadequate reply, as I'm about to head off caving for a
> few days...
> 
> Define a map (or maps) for the part of the cave that is to be offset.
> Look up pg 31 of The (current) Therion book regarding maps.
> 
> Put some code defining an overall map in your INDEX*.th file along the
>  lines of...
> 
>   map MiddleEarthPlanMap \
>   -title "Middle Earth and<br>Lower Greenlink Caves<br>Plan View" \
>   -projection plan
>     GreenlinkFPlan at MiddleEarth   # map defined in surveyF.th
>     MiddleEarthEPlan at MiddleEarth # map defined in surveyE.th
> 
>     GreenlinkKPlan at MiddleEarth [-100 -100 m] above
>     GreenlinkPPlan at MiddleEarth [-100 -100 m] above
>   endmap
> 
> The last two maps in the above will be offset 100m south and 100m west, and
> there will be an outline on the main part of the cave showing where the
> offset passages really lie.
> 
> >Q2: s there a way to make Therion automatically scale the cross-section
> > based on the survey points rather than a scale line?
> 
> I have only ever used the scale line, without trouble, so cannot comment.
> 
> >Question three:  Some of the area symbols seem to be a bit light in their
> >coverage.  I have several areas defined as "clay" or "pebbles", but when
> >drawn on the map there is maybe one or two dots in the area.  Is there a
> >way to increase the density?
> 
> You could try some of the examples here
> http://therion.speleo.sk/wiki/doku.php?id=metapost#cave_symbol_size_and_den
> s ity_examples
> 
> Or perhaps better is to use point clay and point pebbles more often and
>  area clay and area pebbles less often.
> 
> Bruce
> 
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