--------------------------------------------------------------------------------
==== Therion repository on Github ====

[[https://github.com/therion/therion]]
--------------------------------------------------------------------------------
==== Therion 5.5.1 (2020-07-03): ====

therion:
    * duplicate shot length removed from expored individual team member statistics
    * improved Proj support in auto mode (automatic specification of the area of use; caching and logging of the used transformations) and in the Windows build
    * added support for handling of missing coordinate transformation grids (see the proj-missing-grid init file option)
    * support for linking with multiple Proj versions to improve testing (see test_proj.sh)
    * improved mingw-w64 compatibility
    * bux fixed
      - various memory-related fixes by Matěj Plch
      - workaround for Proj 7.1.0 axes swap in Krovak's projection

==== Therion 5.5.0 (2020-05-01): ====

=== therion: ===
    * maps-offset <on|off> feature in thconfig file to disable maps drawn in offset [#159]  
    * maps <on|off> feature in thconfig file to produce map just from scraps, ignoring the maps definition
    * log extend feature in thconfig to log extended elevation construction
    * added point mudcrack (thanks to Rodrigo Severo)
    * added an extensive SBE symbol set (thanks to Rodrigo Severo)
    * geomag data updated up to 2025
    * added support for reproducible generation of PDF and SVG output (command-line option --reproducible-output)
    * make thbook.pdf build reproducible (derive the created/modified dates of the PDF file from the commit date)
    * improved support for Proj 6.0 and 7.0 (see proj-auto init file option)
    * Catch2 unit testing library and Proj test cases added
    * all python scripts use Python 3 now
    * added Serbian (thanks to Ivana Miskovic) and Slovenian [PR#142] translations
    * updated Portuguese translation [PR#170,220]
    * thbook improvements by Benedikt Hallinger [PR#161,162]
    * bugs fixed
      - spelling in some thbook chapters
      - html and kml output [PR#145,150]
      - extend ingore <station> fixed
      - Survex 3D output is missing the nodes on the end of anonymous splay legs [#157]
      - a_blocks_AUT missing semi-colon [#126]

=== xtherion: ===
    * add thconfig* to selectable config file list [PR#168]
    * bugs fixed:
      - Windows xtherion window geometry bugfix

=== loch: ===
    * bugs fixed:
      - MacOS X compilation [PR#144]
      - multiple minor fixes
      - Linux off-screen rendering bugfix

--------------------------------------------------------------------------------

==== Therion 5.4.4 (2019-05-01): ====

=== therion: ===
    * support for Proj 5.0 and newer API (proj.h)
    * bugs fixed:
      - segfault while generating SVG when compiled by newer g++
      - incorrect EPSG projections handling if more than one EPSG codes are used
      - custom projection name missing
      - missing Proj4 human readable projection names

--------------------------------------------------------------------------------

==== Therion 5.4.3 (2019-02-01): ====

=== therion: ===
    * input line length increased to allow reading larger elevation datasets
    * built-in Proj.4 removed; internal mapping of EPSG and ESRI codes replaced by +init=epsg|esri:... libproj initialization string
    * bugs fixed:
      - add and use PROJ grid files in the windows distribution
      - fix comment and code typos [PR#127]

--------------------------------------------------------------------------------

==== Therion 5.4.2 (2019-01-08): ====

=== therion: ===
    * added -color option to select command
    * added lookup command to configuration
    * support for 3D models generated from splay shots
    * added support for label customization
    * added scrap distortions to SQL export
    * therion uses system libproj by default [PR#118,121]
    * metapost output is reproducible now [PR#117]
    * updated Spanish, German, Russian, Bulgarian, Portuguese, Catalan, French, Czech and English translations and messages [PR#77,78,82,83,94,95,102,103,105,107,108,109,112]
    * thbook updates [PR#76,98]
    * bugs fixed:
      - KML with multiple outer polygon outlines
      - other minor bugfixes

=== xtherion: ===
    * support for scrap shifting
    * bugs fixed:
      - fix problems with selection/copy/paste for text editors [PR#86]
      - mouse zooming fixed
      - disappearing menu fixed

=== loch: ===
    * bugs fixed:
      - displaying LRUD envelope for surface & splay shots
      - surface transparency rendering

--------------------------------------------------------------------------------


==== Therion 5.4.1 (2017-04-18): ====

=== infrastructure ===
  * github.com/therion repository created [[https://github.com/therion/therion]]
  * added support for mxe.cc cross-compiler
  * travis-ci.org integration

=== therion ===
  * added fonts-setup layout option
  * added min-symbol-scale layout option
  * added support for -scale <number> for point and line symbols (1.0 ≡ medium symbol size)
  * updated Russian translation [PR#73,74]
  * include UISv1 grade definitions [PR#6]
  * new ini file option: tex-fonts-optional
  * simple CSV database export with shot and equate lists [PR#9,19]
  * KML export improved (survey title, map comment, folder icons, entrances, survey names...) [PR#13]
  * added loop error info to .3d model
  * sync up img.c and img.h with latest Survex versions [PR#16]
  * update to latest poly2tri code [PR#43]
  * documentation improvements [PR#29,38,42]
  * Chinese translation added -- manual setup of fonts in the ini file (pdf-fonts) is necessary (thanks to Zhang Yuan Hai and Duncan Collis)
  * updated Bulgarian, Czech, English, German, Portuguese, Russian and Slovak translations [PR#9,12,18,34,41,46,55,56,58,60,65,67,68,69,70,72]
  * new and updated map symbols:
    - added line rope symbol, updated line handrail in MP [PR#9]
    - added area flowstone to AUT symbolset [PR#35]
    - added line fixed-ladder
    - added polyline_offset macro in MP
    - fixed AUT ceiling-step and ceiling-meander [PR#47]
    - changed AUT painted/fixed station to ASF:fixed layout [PR#48]

  * scale upper limit changed to 1:10
  * geomag data updated upto 2020
  * multiline comments inside (comment/endcomment) block allowed in data and configuration files
  * new TeX variables:

   \cave[max|min]z = altitude max|min value
   \thversion = current therion version
   \currentdate = current date
   \outcs[code|name] = output CS code and name
   \northdir = true or grid
   \magdecl = magnetic declination in degrees
   \gridconv = grid meridian convergence in degrees

  * new metapost variables:

   NorthDir = "true" or "grid"
   MagDecl = magnetic declination in degrees
   GridConv = grid meridian convergence in degrees

  * added Undo/Redo toolbar buttons
  * added option Edit->Hide inactive scraps
  * added context menu, right click on line and point
  * -enable/disable spay-shots should work for VRML and DXF format (splay shots in separate layer)
  * added ATTR_shotflag_splay, ATTR_shotflag_duplicate, ATTR_shotflag_approx to metapost code before line survey
  * warning raised, if equate statement creates new station in some subsurvey
  * removed transaction from SQL export
  * added -survey option for map for setting survey associated with map. For example all surveying statistics from this survey will be used, when this map is selected for output.
  * added sketch-colors <number-of-colors> option to thconfig file, to reduce size of sketch bitmap images in maps
  * hide symbol from legend, if it has explicitly empty translation
  * survey-level works for point station-name labels, if station name is automatically determined (no -text is specified)
  * symbol-show|hide group text for point label, remark, date and line label
  * grid-angle <value> <units> - can be used in centerline to specify magnetic grid angle (declination against grid north).
  * -cs output specification works for export cave-list (including lat-long)
  * dates are shown using OS locale settings in map export
  * layout statistics explo/topo-length on/hide/off -- if it is off, team members are sorted alphabetically
  * KML export format supported for cave-list and continuation-list
  * added new point types: ice-stalactite, ice-stalagmite, ice-pillar, clay-choke, clay-tree
  * added new wall subtypes: pit, flowstone, moonmilk, overlying
  * added new symbol groups: ice, sediments
  * added -height option for pit/wall:pit
  * added new layout option: color map-bg transparent
  * Austrian symbol set added (thanks to Georg Pacher)
  * updated German translation (thanks to Georg Pacher)
  * updated Italian translation (thanks to Marco Corvi)
  * added bulgarian translation (thanks to Alexander Yanev)
  * added possibility to define own coordinate system in therion.ini (cs-def)
  * updated survex img library to version 1.1.15
  * added option -enable/disable splay-shots to 3d model export
  * bugs and issues fixed:
    - remove debugging output when reading Survex err files
    - don't accept stddev <= 0
    - fix missing font declarations when using pdf-fonts with more than 256 chars
    - added export of CLIP attribute in SHP export
    - include coordinate system and date-surveyed in the .3d export [PR#9,19]
    - fix warning "Can't Open Cavern Log File For Input" [PR#9]
    - fix compiler warnings [PR#10,22,24]
    - fix altitude colours with centreline [PR#11]
    - fix survex path detection
    - ensure text files end with a new line [PR#14]
    - fix typos in messages and comments [PR#17,23,25,39,40,45]
    - make "make clean" work fully for debug build [PR#20]
    - regularise indentation to use spaces [PR#26]
    - whitespace clean-up [PR#27]
    - sync divergent docs of therion command line [PR#28]
    - eliminate second copy of Survex img code [PR#33]
    - remove accidentally committed files [PR#37]
    - remove redundant NULL checks [PR#44]
    - use $(MAKE) instead of make [PR#51]
    - improve calculation of fractional year [PR#52]
    - fixing raft-cone point being drawn as raft [PR#54]
    - black area displayed instead of some patterns in SVG
    - broken XHTML output when string formatting keywords are used in map-comment etc.
    - unescaped special characters in map-comment etc. in XHTML
    - improved error message when therion can't map custom TeX fonts in MetaPost macros to Unicode
    - cave depth value in XHTML output
    - invalid compass/backcompass averaging formula
     - invalid colors for station names and wall altitudes
     - update survex img parser to v8 (should fix various errors)
     - several patches from Wookey's debian distribution applied
     - color map-fg altitude should work for elevation projection
     - error deleting temporary directory
     - missing vcomp100.dll in Win32 installation
     - compilation under MacOS X works - see http://therion.speleo.sk/wiki/doku.php/os-tips:osx10.8 
     - PLT export in output coordinate system
     - context point air-draught not working
     - instrument position in centerline does not work
     - debug scrap-names crashes if empty scraps
     - counter not working in centerline data diving
     - revise not working outside of survey context
     - wrong length/depth and other statistics calculation for map output
     - sketch bitmaps inserted multiple times in PDF files
     - fixed huge coordinate numbers in extended elevation xvi
     - xvi with sketches export
     - unnecessary warningcheck changes eliminated from metapost code
     - fixed bug with 3d model generation from scraps without outline
     - fixed bug with missing patterns in symbols.xhtml
     - fixed bug - direction point not working with line secion
     - fixed inaccurate clipping of coloured scrap background
     - fixed placement of surface bitmaps with larger offset
     - fixed alignment of some point symbols in AUT symbol set
     - missing white fill below cave passages in transparent PDFs if background colour is white (needed if the map is included into other map with non-white background)
     - fixed incorrect line width conversion in some patterns
     - hide white background of scraps when the PDF layer containing them is invisible
     - constrained Delaunay triangulation engine replaced by poly2tri
     - passage outline scanning algorithm improved
     - "nosurvey" shots allowed between unfixed stations
     - added missing area flowstone and moonmilk into legend
     - fixed xvi export of extended elevation
     - fixed symbol-hide/show point remark bug
     - fixed wall:debris bug in AUT symbol set (thanks to Georg Pacher)
     - fixed layout color map-bg transparent bug
     - LRUD area dimensions is drawn for all shots before these shots are drawn (centerline is compact when map is exported from centerline only)


=== xtherion: ===
  * shortcuts to delete a line point (Ctrl-Shift-D) and zoom (Ctrl-Up/Down)
  * colouring of lines based on type
  * station point shown with triangle instead of dot
  * Line simplification command to reduce number of points without converting to Bezier [PR#8]
  * apply proper collation when sorting [PR#71]
  * elevation orientation in Compiler map structure
  * resetting symbol options when type is changed can be turned off using xth(gui,me,type_reset_options) variable
  * you can turn off symbol type translation in dropdown menus using  xth(gui,me,type_dropdown_trans) variable
  * added Undo/Redo toolbar buttons
  * added option Edit->Hide inactive scraps
  * added context menu, right click on line and point
  * bugs fixed:
    - fix long delay processing large log files [PR#2]
    - fix loading of files with no extension in text editor [PR#30]
    - fix line point contextual menu [PR#61]   - fix xtherion/lang/process.pl regex [PR#62]
    - include missing translatable texts [PR#63,66]
    - enable canvas zoom with the mouse wheel [PR#64]
    - uncomprehensible error message while loading unsupported progressive JPEGs
     - area type u type change bug
     - update survex img parser to v8 (should fix various errors)
     - several patches from Wookey's debian distribution applied
     - BOM handling in UTF-8 files
     - ver.tcl ends with lf only
     - new file in xtherion works, even if file is already open 
   
=== loch: ===
  * VTK 6.0 support
  * wxWidgets 3.0 support
  * VTK file export changed to binary type (problem with coordinate systems)
  * bugs fixed:
    - file open dialog not working properly on Debian linux
    - vthreshold should work now for LRUD modelling - 

--------------------------------------------------------------------------------
==== Therion 5.3 (2010-02-17): ====

=== therion: ===
  * added <lang:XX> language selector for strings
  * -filter (on)|off option added to continuation export to support exportof all continuations
  * -surveys (on)|off option added to cave-list export to allow export of rawlist of caves
  * new easy setup for OpenType and TrueType fonts (requires lcdf-typetools)(new otf2pfb and pdf-fonts options in therion.ini)
  * basic support for right-to-left scripts in labels and legend
  * PDF files now contain unicode mapping information to allow searching and copying texts consisting of accented and non-latin characters
  * georeferencing data added to pdf maps
  * new layout option: symbol-color <type> <symbol> <color>
  * new symbol groups: water, speleothems, passage-fills, equipment
  * new flags for stations: arch and overhang to mark these surface karst features
  * support for splay shots without station names (using "-" or "." as station name)
  * added greek translation (thanks to Stelios Zacharias)
  * added albanian translation (thanks to Fatos Katallozi)
  * updated german translation (thanks to Roger Schuster; Georg Pacher's additions to be implemented soon)
  * sketches displayed in map layer in pdf and svg, not among surface bitmaps (T#8996)
  * PROJ.4 library updated to 4.7.0
  * geomag data updated until 2015
  * bugs fixed:
    - BCRA3 and BCRA5 survey grades fixed
    - missing altitudes in cave list
    - atlas page exclusion
    - map header positioning using real numbers
    - attribute export to metapost
    - fixed russian translation (B#26399)
    - transparency in metapost reset when followed by clipped area
    - back readings supported in data roles+instruments
    - missing LRUD data in PLT export (B#25532)
    - segfault on line with single point
    - "-flip none" not working for scrap
    - lat/long out of range
    - map-header x y off behaves as if map-header x y nw (B#25537)
    - incorrect boundary of background sketches in pdf and svg maps
   
=== xtherion: ===
  * script for creation of OziExplorer MAP files for georeferenced maps (Help->Calibrate bitmap)
  * added import functions for PocketTopo export
    - centerline in text editor: File->Import->PocketTopo therion export
    - sketches in map editor: Backgroud Images->Insert->PocketTopo therion export
  * bugs fixed:
    - increasing of station numbers with leading zeros or trailing letters
   
=== loch: ===
  * added File->Import function to allow merging of e.g. 3d files with DTM in loch format
  * added Tools->Options->Measurement system setup
  * splay and duplicate shots are hidden by default
  * entrances, stations and fixed stations and their labels can be displayedon screen (added toolbar buttons and Scene setup->Stations control panel)

--------------------------------------------------------------------------------
==== Therion 5.2 (2008-08-07): ====

=== therion: ===
  * statistics of explored but not yet surveyed passages. Just specify `-explored <length>' to point continuation or add `explored <length>' to station flags and this length will be used in survey/cave statistics.
  * new handling of user defined symbols (including legend)
  * improved station flags handling. Added new flags for stations: sink, spring, doline, dig, air-draught(:winter|summer). Also `not' is supported before flag. User defined attributes may be added to stations using flag `attr' followed by attribute name and value.
  * station flags can be turned on|off using layout: symbol-show|hide point flag:entrance|continuation|sink|spring|doline|dig...
  * added `splay' and  `approx[imate]' survey shot flag
  * grid labeling using coordinates - layout option grid-coords off|border|all
  * ability to color labels by scrap color using `color labels on|off' in layout
  * user can change translation of therion texts at runtime using `text' option in configuration or initialization files
  * when layouts are copied one into another, map-comments are concatenated instead of replaced
  * added russian translations + encodings (thanks to Vasily Vl. Suhachev)
  * updated french translations (thanks to Gilbert Fernandes)
  * attributes to metapost are exported as strings only
  * bugs fixed:
    - symbol-show|hide line moonmilk works
    - declination output fixed (half year shift removed)
    - invalid LRUD dimensions in PDF map output
    - installation script
    - page grid origin not affected by rotation/meridian convergence
    - scale works with all point labels
   
=== xtherion: ===
  * ERROR/WARNING state of compilation
  * changed increased default sidebar width + default sidebar width configuration option in xtherion.ini file
  * single .xtherion.dat file containing survey and map structures is created after compilation
  * bugs fixed: 
    - "end of line" characters translation
    - toolbar icon decriptions added to localization files
   
=== loch: ===
  * export of cave 3D model in VTK format using File->Export
  * bugs fixed: 
    - wxWidgets 2.8.0 compilation thanks to Olly Betts
    - walls altitude coloring under Linux

--------------------------------------------------------------------------------
==== Therion 0.5.1 (2007-08-29): ====

=== therion: ===
  * added configuration for debian based linux systems: make config-debian
  * new samples directory
  * new subtypes for air-draught symbol: winter and summer
  * new area types: flowstone, moonmilk
  * ability to display overlying maps in offset
  * new point and line type: map-connection (used to indicate connection between map parts - extended elevations, maps in offset)
  * improved default centerline symbols
  * LRUD envelopes of maps exported from centerline
  * point -extend option changed to -from
  * user defined types of points/lines/areas (using u type and  custom subtype string e.g. u:electric-cable)
  * scraps without calibration stations are allowed
  * coordinate system specification allowed for scraps
  * areas exported to SHP files
  * export of simple DXF maps
  * updated Italian translation (thanks to Marco Corvi)
  * bugs fixed:
    - top level objects selection
    - generation of extended elevation
    - map coloring
    - creating surveys from .3d files
    - subpixel inaccuracy with bitmap morphing
    - entering angles/lat-long in degree:minutes format
    - shapefile export fixes
   
=== xtherion: ===
  * DXF/SVG import in map editor (File->Import)
  * symbol themes and translations comboboxes
  * autocompletion in symbol type comboboxes
  * bugs fixed:
    - translations of type:subtype works

=== loch: ===
  * first Mac OS X version works
  * bugs fixed: 
    - surface texture mapping under Linux

--------------------------------------------------------------------------------
==== Therion 0.5.0 (2007-02-02): ====

=== therion: ===
  * geodetic coordinate systems support -- CS specification in layout, centerline, surface, import and configuration file. Coordinate systems used all around the world are supported (EPSG and ESRI standards).
  * added GEOMAG model for automatic calculation of magnetic declination according to cave coordinates and survey date
  * multiple images (PDF, PNG, JPEG) in PDF map supported (e.g. plan and xelevation in single PDF) using new layout option map-image <x> <y> <align> <filename>
  * new improved vector morphing algorithm
  * morphing of survey sketches now supported. New -sketch option   for scrap + sketches switch in layout. Allows export of morphed   survey sketches in PDF and XVI. ImageMagick package   (convert and identify executables) are needed to use these features.
  * -attr option for specification of user defined attributes   valid for all objects. Attributes are exported to metapos   code using ATTR_* variables.
  * shapefile map export format
  * Google Earth (.kml) map (scrap outlines) and model (centerline   export
  * -enc|-encoding option allowed for map and model export
  * top level survey command not needed any more
  * survey: new -namespace switch, enables using datasets with   unique station names
  * new area type: bedrock
  * subtype specification is now possible using ":" separator   (e.g. border:invisible)
  * added "system" command in configuration files to execute   system commands during therion compilation 
  * new layout option: north (true)|grid
  * -calibrate option for import
  * source/endsource construct allowed in configuration files
  * input allowed within multiline commands
  * improved ceiling and floor meander symbols
  * background centerline map exported only when no scraps or maps   exist
  * support for 1.1 survex .3d file format
  * added German translation of symbols (thanks to Roger Schuster),   updated Italian translation (thanks to Marco Corvi).
  * default Linux installation is done into "/usr/local" instead    of "/usr" directory
  * bugs fixed:
    - automatic calculation of atlas paper size when only size is specified
    - extended elevation generation ("break" removed, only "ignore"     works)
    - empty map when exported with -layout-color map-fg map

=== xtherion: ===
  * compiler preview toolbox (experimental, acrobat reader supported   on Win32, xpdf on Linux (original idea of Marco Corvi))
  * sketch control (insert, remove) in scrap toolbox
  * 3D viewer removed from xtherion
  * does not connect to Internet any more to check new version available
  * remembers last working directory on Windows
  * improved scrap scaling - "Scale" button + scale preview arrow in scrap   control
  * scrap selection selects current scrap first
  * bugs fixed:
    - hang when area inserted at the end of file
    - deleting contents of configuration files should not happen any more
    - fixed zooming of transparent pictures

=== loch: ===
  * bugs fixed: 
    - initial size on multiple display machines
    - crash when file with texture is opened as loch argument (or     doubleclick on Win)

--------------------------------------------------------------------------------
==== Therion 0.4.0 (2006-10-02): ====

=== therion: ===
  * loch - new 3D viewer and default 3D export format
  * VRML model export improved (added surface texture)
  * export model: -wall-source (all)|maps|centerline -- specify   the source of passage walls
  * layout: survey-level <N> -- show up to N surveys with station   names (default N=0, survey-level all is also accepted).
  * 3d file import improved -- multiple imports of the same centerline   allowed
  * if no map is selected with export, also centerline is exported
  * symbol sets overview using --print-symbols option. Output in    XHTML format (file symbols.xhtml).
  * fixed bug with autojoin and multiple projection output

=== xtherion: ===
  * images outside .th2 file path accepted, relative path is still   created using ".." directory reference
  * area border lines are highlighted, when selected in listbox
  * backup of configuration files is created after OK compilation
  * added IT translation

--------------------------------------------------------------------------------
==== Therion 0.3.10 (2006-04-05): ====

=== therion: ===
  * decimal point in low passage heights
  * fixed bugs: loop closure errors log, symbol-hide group cave-centreline
  * SVG export in XHTML format
  * flowstone and waterflow symbols joined in legend, if used   as line and point together
  * improved loop closure method selection - if there was an error   when processed using survex - therion is used for loop closure
  * when scrap size exceed metapost limits - more reasonable errors   are generated + limit for centerline scraps is larger
  * layout: you can change overlap or size and page setup is automatically    recalculated
  * layout: color map-fg scrap
  * layout: debug station-names

=== xtherion: ===
  * added toolbar (thanks to dzach)
  * added text editor template (in xtherion.ini file)

--------------------------------------------------------------------------------
==== Therion 0.3.9 (2005-08-30): ====

=== therion: ===
  * units (metric)|imperial in layout and initialization file
  * new therion.ini switch: loop-closure therion|survex   By default, survex is used if  present, otherwise therion.
  * fixed bugs - error log when disk full, vtreshold -> vthreshold
  * map export to .3d files
  * scraps in one .th2 file that have common end line points are   automatically joined
  * scrap names in map output, via layout: debug scrap-names

=== xtherion: ===
  * fixed bugs - view is not moved when line is split, file is   not changed when image insertion is canceled

--------------------------------------------------------------------------------
==== Therion 0.3.8 (2005-05-10): ====

=== therion: ===
  * SVG export added (features not yet supported: map header, font embedding,   layers, map transparency -- this requires SVG 1.2 features)
  * DXF model export added
  * export format automatically determined from file extension
  * layout: map-header-bg on|(off) - when on, background of map    header is filled with background color
  * .ini files installed into /etc directory, .ini.new files always installed

=== xtherion: ===
  * new items in xtherion.ini file
  * text editor - indent mode now similar to ordinary text editors

--------------------------------------------------------------------------------
==== Therion 0.3.7 (2005-03-16): ====

=== therion: ===
  * new (more intuitive) extended elevation arrangement
  * new import options: filter, surveys
  * new surface option: grid-flip
  * new centerline option: extend
  * new point type: dimensions
  * new scrap option: flip 
  * new scrap/centerline option: station-names 
  * reduced `extend' point option
  * all altitudes are exported as a difference against grid Z origin
  * XVI (xtherion vector image) map export
  * UD data from centerline used in 3D model generated from scraps
  * plt export with LRUD data
  * `/' supported as survey name character
  * Unicode characters support in layout TeX code
  * fixed bugs: plumbed shots; join; statistics of centerline only maps

=== xtherion: ===
  * limited i18n support
  * XVI support (automatic insertion of survey stations, LRUD data)
  * fixed bug with gamma correction

--------------------------------------------------------------------------------
==== Therion 0.3.6 (2005-01-31): ====

=== therion: ===
  * LRUD passage dimensions support
  * centreline processed in other programs (*.3d, *.plt) may be imported
  * transparent solid surface in 3D model
  * map colouring support
  * map grid support
  * if station subtype is not specified, Therion reads it from centreline,    if it's specified there
  * MetaPost symbols completed and improved (error handling,   division by zero fixed)
  * scrap filled and clipped correctly even if scrap border intersects itself
  * centerline, bounding box and surface supported in 3DMF and VRML export
  * Spanish translation added
  * input language changes:
    - centreline command: mark, walls, vtreshold;
       * new role pics
       * new data item ignoreall
       * new data type dimensions (station, up/ceiling, down/floor, left, right)
       * LRUD dimensions may specified as pair [<from> <to>]
    - point command: snow
    - line command: ceiling/floor-meander, border:presumed
       * line gradient and water-flow not clipped by default
    - area command: blocks, snow, ice, clay, pebbles
    - scrap command: -3d changed to -walls option
    - equate command: may be used outside of centreline
    - import command added
  * configuration file changes:
    - layout command: grid, grid-size, code/endcode, color map-fg <altitude/map>, color-legend

=== xtherion: ===
  * new items in xtherion.ini
  * file timestamps are checked while saving
  * auto save feature
  * lot of bugfixes
  * Map editor: new shortcuts (ctrl-a, ctrl-r, page up/down, shift page up/down)
  * Map editor: clicking twice on the same point ends the point insertion mode
  * Map editor: station names are automatically increased (or decreased :) in   extended elevation)

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==== Therion 0.3.5 (2004-11-25): ====

=== therion: ===
  * map rotation in 2D output supported
  * bug fixed: -scale option works for point labels
  * input language changes:
    - centreline command: percent[age] clino units support
  * configuration file changes:
    - layout command: rotate

=== xtherion: ===
  * Map editor: point, line and area symbol are never inserted    outside of a scrap
  
--------------------------------------------------------------------------------
==== Therion 0.3.4 (2004-10-22): ====

=== therion: ===
  * MetaPost and TeX supplied in Therion for Windows installer   work even if there is other TeX(Live) installation present in the system   (see the tex-env initialization file option)
  * if there are no maps defined and map is exported,   all scraps in given projection are  exported 
  * input language changes:
    - centreline command: group/endgroup
  * initialization file: 
    - new option: tex-env
  * fixed bug in atlas export introduced in 0.3.3
  * fixed minor MetaPost bugs

=== xtherion: ===
  * Compiler: hyperlinked error messages
  * Map editor: larger tick at the line symbol beginning
  * Map editor: new scrap is inserted in the beginning of the file
  * Map editor: fixed bug when deleting last line point
  * Map editor: line symbol type change resets rotations and lengths   set-up in the line points

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==== Therion 0.3.3 (2004-09-10): ====

=== therion: ===
  * surface (topographical) map supported in 2D maps
  * surface grid supported in 3D models (therion format)
  * typesetting of legend symbols in multiple columns fixed 
  * input language changes:
    - new command surface
    - point, line and area commands have new option: context
    - line command: survey has new subtypes: cave, surface
    - line command has new option: adjust
    - map command: ability to draw centreline from specified survey without       drawing a scrap;       new option: projection
  * configuration file changes:
    - layout command has new options: legend-width, legend-columns,        surface, surface-opacity
    - export model has new options: enable, disable

=== xtherion: ===
  * Model viewer: mouse wheel supported

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==== Therion 0.3.2 (2004-07-22): ====

=== therion: ===
  * configuration file changes:
    - layout command: scale 1 50 up to 1 100000 allowed and supported
  * Therion constructs accented characters if the character is not present   in the font. It used to omit the accent and display the base character only
  * error message `invalid command context' changed to    `missing xxx command before yyy command'
  * French translation added

=== xtherion: ===
  * line split bug fixed
  * automatically checks for updates
  * 3D viewer: reload (Ctrl+R)
  * 3D viewer: bounding box computation fixed

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==== Therion 0.3.1 (2004-04-23): ====

=== therion: ===
  * input language changes:
    - scrap command has new option: 3d
  * windows version: accepts slashes as directory separators in the    export command
  * Czech translation added

=== xtherion: ===
  * Map editor: fixed bug with empty lines displayed as text
  * Map editor: doesn't allow to insert a background image if the *.th2   file hasn't been saved

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==== Therion 0.3.0 (2004-04-16): ====

=== therion: ===
  * Therion exports 3D model
  * loop closure algorithms implemented in Therion
  * input language changes:
    - centreline command: fix doesn't accept covariances specification
  * configuration file changes:
    - layout command: map-header improved
    - export command: new formats for 3D model export added -- vrml, 3dmf,     therion (default)
  * initialization file changes: 
    - removed item: path-cavern
  * log file contains both loop errors and scrap distortions at the end
  * completely new Win32 installation with TeX and Tcl/Tk included

=== xtherion: ===
  * data file may be specified as an argument from the command line
  * basic 3D model viewer added
  * Map editor: only the visible part of background images is zoomed   (less memory consumption and speed improvement)

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==== Therion 0.2.19 (2004-03-01): ====

=== therion: ===
  * input language changes:
    - place option of point, line, area commands: none renamed to default
    - area command: place bottom is default
    - line command: if contour has no gradient specified, visualization      is symbol-set dependent (no gradient tick in UIS, tick in the middle      in SKBB)
    - line command: pit may be spelled as pitch
    - line command has new type: gradient
    - survey command has new option: person-rename
  * configuration file changes:
    - layout command has new option: debug
    - select command: new rules for selection if there is no map selected
  * scrap transformation improved, distortion logged in the log file
  * debugging map mode shows scrap distortions
  * bug fixed in PLT export 

=== xtherion: ===
  * Map editor: status bar displays command preview
  * Map editor: new Area control
  * Map editor: `Move to' in File commands added
  * Map editor: name of the edited scrap displayed in Title bar
  * Map editor: edited line is highlighted
  * Map editor: selected area is highlighted
  * Map editor: orientation tick at the beginning of line symbols
  * Help/Control dialog with key and mouse shortcuts
  * input (keyboard) encoding menu

--------------------------------------------------------------------------------
==== Therion 0.2.18 (2004-02-12): ====

=== therion: ===
  * Therion supports translations of texts in PDF map/atlas output
  * Therion exports centreline to SQL database
  * input language changes:
    - line command has new type: water-flow
    - centerline command: discovery-date/team renamed to explo-date/team
    - layout command has new options: language, colo[u]r, symbol-show,       map-comment, map-header, scale-bar, statistics
    - -author and -copyright options apply only to centreline and scrap,     -title to survey, centreline, map and scrap
    - it's possible to leave date field unspecified `-'
  * configuration file changes:
    - export command has new type: database
  * initialization file changes: 
    - new items: language, encoding-sql
    - encoding_default renamed to encoding-default
  * air-draught ticks set according to -scale option

--------------------------------------------------------------------------------
==== Therion 0.2.17 (2003-12-04): ====

=== therion: ===
  * input language changes:
    - layout command has new options: base-scale,        symbol-set, symbol-assign, symbol-hide
    - size option for point and line symbols accepts following values:        tiny (xs), small (s), normal (m), large (l), huge (xl)
  * support for run-time loading of map symbols
  * MetaPost processing optimizations

--------------------------------------------------------------------------------
==== Therion 0.2.16 (2003-11-24): ====

=== therion: ===
  * input language changes:
    - centerline command has new team roles: instruments (insts), assistant (dog)
    - centerline command has new data readings:        up/ceiling, down/floor, left, right, ignore
    - centerline may be spelled as centreline
    - deg:min:sec syntax allowed for degree values
    - point, line and area commands have new option: visibility on/off
  * new rules for displaying map previews
  * new initialization file items: tmp-path, tmp-remove
  * error if no source files are specified
  * if error occurs under Win32, Therion waits until RETURN is pressed

=== xtherion: ===
  * Help/BAC Calculator dialog added

--------------------------------------------------------------------------------
==== Therion 0.2.15 (2003-11-14): ====

=== therion: ===
  * input language changes:
    - layout command has new option: code <metapost|tex-map|tex-atlas>
    - join command has new option: count <N>
  * therion checks validity of UTF-8 encoded input files
   
=== xtherion: ===
  * bug fixed -- compiler does not add empty lines to config files

--------------------------------------------------------------------------------

==== Therion 0.2.14 (2003-07-16): ====

=== therion: ===
  * input language changes:
    - layout command has new option: layers on/off
  * initialization file syntax changes:      cavern-path, pdftex-path, mpost-path, source- path 
  * fonts setup for PDF output
  * updated documentation
  * Therion reads (definitely) following environment variable: 
    - THERION -- search paths for [x]therion.ini file

--------------------------------------------------------------------------------
==== Therion 0.2.13 (2003-06-16): ====

=== therion: ===
  * thpdf, theps2pdf and 3dtops external programs integrated into Therion
  * MetaPost and TeX macros compiled into Therion 
  * compilation: just "make" is enough; works also on win32 systems
  * input language changes:
    - centerline command has new options: discovery-date, discovery-team
    - point command: type anostomosen renamed to anastomosis
    - layout command has new option: transparency on/off
    - layout command has changed option: opacity 0.0-100.0
    - layout command has changed option: grid-size is measured in real units
  * Therion reads following environment variables: 
    - THINIT -- search paths for [x]therion.ini file
    - THERION -- search paths for configuration and source files
  * PDF output: support for Optional Content Groups (Layers) in Acrobat 6

=== xtherion: ===
  * Text editor: text undo/redo works with tcltk8.4.3
  * Map editor: line symbols may be split
 
----