===== Preparation of thconfig =====

File thconfig is inpout parametric file for compiler of therion. By the help of this file we may define many parameters of outputs from therion, including resolution of map, what will be in legend, color of background, and there is possible to define shape, color, size, etc. of used symbols, point or line symbols on generated map here. 

**Example of file thconfig**

      source homolak
      layout homolak
          #resolution of final map
          scale 1 100
          #color of final map.
          color map-bg 85 # dle barvy [100 100 100]
          #color by altitude
          #color map-fg altitude
          transparency on
          opacity 90
          # names of persons which surveyed the cave will be added how much they surveyed
          statistics topo-length on
          # the language of legends in map
          language cz
          #show the legend
          legend on
          map-header 8 100 e
          #type of used symbol sets SKBB/UIS/ASF/CCNP
          #symbol-set SKBB
          #to show the names of surveying points 
          debug station-names
          #setup of grid
          grid bottom
          grid-size 10 10 10 m
          #rotation of map
          #rotate 30
          #symbol-assign point station UIS
          #symbol-hide point station
          #don't generate any symbol
          #symbol-hide group all
          #don't generate point section symbol
          #symbol-hide point section
          #generate line wall symbol
          #symbol-show line wall
          #generate line survey symbol
          #symbol-show line survey
          #don't generate line flowstone symbol
          #symbol-hide line flowstone
          
      endlayout
      export map -output output/homolak.pdf -layout homolak

**Inserting of Metapost code into layout section**

The next construction allows insert a piece of Metepost code into configuration file of therion compiler.

        code metapost
        .....
        .....
        here is definition of symbol
        .....
        endcode

Now we may modify the definitions of symbols. [[mmj:4|Modification of symbols - how to]]