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do [2014/12/10 19:30] – link to CSG Sustainable mapping brucemuttondo [2019/05/01 20:44] (current) – [Data Structures] tarquinwj
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 ====Data Structures==== ====Data Structures====
 [[bds|Bruces data structure]] An incomplete and not yet well thought out description of concepts and ways to organise Therion data.\\ [[bds|Bruces data structure]] An incomplete and not yet well thought out description of concepts and ways to organise Therion data.\\
 +[[extend|Extended Elevations]] Manage extended elevations independently of survey trip data and drawings.\\
 +[[cavelengths|Helping Therion to calculate cave lengths]] using the right data structures.\\
 +\\
 [[tbe:playground|Therion by Examples Playground]] Simple examples that demonstrate particular features one at a time using 'bare bones' data structures. [[tbe:playground|Therion by Examples Playground]] Simple examples that demonstrate particular features one at a time using 'bare bones' data structures.
  
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 The easy way is to accept that you will only produce a good looking map with labels within a narrow range of scales (5.3.9 Nov 2011).\\ The easy way is to accept that you will only produce a good looking map with labels within a narrow range of scales (5.3.9 Nov 2011).\\
  
-While the size of the text naturally scales with the map, the positioning that works at one scale will be too far from, or overlap the cave at other scales.  A reasonable compromise would be to progressively hide small text at smaller scales.\\+While the size of the text naturally scales with the map, the positioning that works at one scale will be too far from, or overlap the cave at other scales.  In order to minimise this effect, always make careful use of label and symbol insertion points, ie -align top, bottom, left, right, center, tl, tr, bl, br 
  
-Unless you devise custom parameters and incorporate these in your text labels, see forum posts [[http://article.gmane.org/gmane.comp.gis.therion/933/match=importance+scaling+text+orientation|from Stacho Mudrak]], [[http://article.gmane.org/gmane.comp.gis.therion/2882/match=print+flag+point+label|from Ben Cooper]] there is no tidy way to tell Therion to print some labels and not others.  On the face of it there is a built-in parameter, //-size xs s m l xl//, that would seem to lend itself to scale dependant visibility of text, but the features required have not yet been implemented I have provided a work-around hack on the [[templates#general_setup|templates page]]+As of 5.4.1 Apr 2017 you can use the layout option __min-symbol-scale__ to progressively hide small text at smaller scales.\\
  
 +<del>
 +Unless you devise custom parameters and incorporate these in your text labels, see forum posts [[http://article.gmane.org/gmane.comp.gis.therion/933/match=importance+scaling+text+orientation|from Stacho Mudrak]], [[http://article.gmane.org/gmane.comp.gis.therion/2882/match=print+flag+point+label|from Ben Cooper]] there is no tidy way to tell Therion to print some labels and not others.  On the face of it there is a built-in parameter, //-size xs s m l xl//, that would seem to lend itself to scale dependant visibility of text, but the features required have not yet been implemented.  I have provided a work-around hack on the [[templates#general_setup|templates page]]
 +</del>
 ====Survey and map ids are replaced by survey and map titles==== ====Survey and map ids are replaced by survey and map titles====
  
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