[Therion] Altitude colors range

[Bruce]

>Now I have added this into my surveys, I see that the centreline is

rendered as solid lines when you include the centreline (and have not

set the centreline symbol group to be hidden), but if you do not

include the centreline then the survey lines renderer in the scraps

are just dashes at each station rather than complete lines running the

complete distance between pairs of stations. Not a problem, but

curious as to why I get two different styles for cave survey lines.

 

      It has always been this way.  I did delve into the metapost once to
see why, from a code perspective.  It seems rational behaviour as far as
'using it' goes.

 

>Then I tried this on my 66km system survey and with centrelines set to

show in my layout, I found metapost used up all the words of memory it

is allowed so I get no output. From my logfile:

...

How can I get around this limitation?

 

      Interesting.  I have never come across this limitation, although
metapost usually logs messages of seeming complaint.  I inquired on the
forum years ago, and one of the Martin's or Stacho assured me that it should
never actually run out.  Not sure if I have ever plotted 66km of centreline?
I have probably come close.

 

>I can see how it is useful to be able to render centrelines and stations
for the entire system regardless.

 

      Yes, very useful.  I add each survey as it becomes available.  It is
then in the outputs as a reminder to draw the scraps!  Further - you can
differentiate the flags that apply to each survey shot with colour and line
style.

See the wiki
http://therion.speleo.sk/wiki/doku.php/metapost#general_symbol_examples 

 

Under the heading "Visualize cave centreline shot flags with colour for
splay and duplicate, and dash for approximate shot flags"

 

Bruce

 

 

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