To follow on from Bruce's section on Therion header overrides in his Map
Definitions thread it seems a good idea to split overrides off into a separate
topic..
Survey and map definitions also give you control over the title that appears on
the drawing.
It can be complicated, but I once figured it out, and made this bit of code to
put in layouts used for plan outputs. I prefer to allow Therion to decide the
output title based on the information I have entered in surveys, maps and
selections, but sometimes an override is required. Note that Therion assumes a
survey or map title is the same as its id, unless you specify -title "name" to
override the id. My preference is to always give surveys or maps likely to be
a primary selection for output a title that I would like to see on a finished
pdf output (and use a concise id).
The code, as below, only has effect if due to the users choices, Therion cannot
deduce a unique name for the output.
#PLAN Cave Map Details
#--------------------
# Define Map title overrides
code tex-map
% Output map title as determined by Therion 5.3 is stored in cavename.
% It will be empty if there are multiple maps selected for any one projection
% AND there are multiple source surveys identified in the thconfig file
% ie Therion can not infer a unique title from the input data given.
% This code allows you to define an output map title {cavename} if it
happens to be empty
\edef\temp{\the\cavename} % cavename from Therion
\edef\nostring{} % empty string
\ifx\temp\nostring % test if cavename is empty
% if empty reassign cavename to describe selected maps as a group
\cavename={Project Area Caves}
\else % if not empty keep the value set by therion, or assign an override
cavename here
\fi
endcode
I have been using this in my layouts to give me multiple lines on my map titles
with the added ability to adjust the font size. Size[30 or whatever size you
need]
medskip can be changed to bigskip or smallskip to alter the spacing between the
lines of text.
###############THERION OVERIDES##############
##Override Therion Map Header Data###
#------------------------------------------------------
code tex-map
\cavename={\size[20] Tom Taylors Cave\medskip \size[30] How Stean Gorge\medskip
\size[30]North Yorkshire}
endcode
The override below is to change the Therion default team, cave length, cave
depth data on the map output. Used in this case because a short surface survey
needed to be shown on the map but the data was skewing the actual cave length
and depth.
##Override cave length and depth to remove surface leg data##
#------------------------------------------------------------------------------------
code tex-map
\topoteam{BSD}
\cavelength{164m}
\cavedepth{12m}
#endcode
Both these overrides I borrowed from one of Andrews configs in the BCA data
archive which I find a great resource. No point reinventing the wheel, even if
I could.
Nick
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