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- --------------------------------------------------------------------------
-
- TreeViz
- A Macintosh Implementation of Treemaps
-
- The University of Maryland is distributing TreeViz through the
- Office of Technology Liason. The TreeViz program runs on all color
- Macintoshes and is accompanied by a small user manual. TreeViz is
- written in object oriented Think C on the Macintosh, source code
- licenses are available.
-
- Purchasing and Licensing:
-
- TreeViz Orders
- Office of Technology Liaison
- 4312 Knox Road
- University of Maryland
- College Park, MD 20742
-
- (301) 405-4208
- FAX: (301) 314-9871
-
- Submit a US bank check or money order for US$25 ($30 overseas) made
- out to the "Office of Technology Liason" (no cash please).
-
- --------------------------------------------------------------------------
-
- Related Technical Papers:
-
- The definitive source:
-
- Brian Johnson. Treemaps: Visualizing Hierarchical and Categorical
- Data, Ph.D. Dissertation, University of Maryland, 200+ pages, 1993
-
-
- Dave Turo and Brian Johnson. Improving the Visualization of
- Hierarchies with Treemaps: Design Issues and Experimentation. May
- 1992, CAR-TR-626, CS-TR-2901, Department of Computer Science,
- University of Maryland. To appear in Proc. IEEE Visualization '92.
-
- Brian Johnson and Ben Shneiderman. Tree-maps: A Space-Filling Approach
- to the Visualization of Hierarchical Information Structures. Proc.
- IEEE Visualization'91 (San Diego, California, October 1991), 284-291.
-
- Brian Johnson. TreeViz: Treemap Visualization of Hierarchically
- Structured Information. Proc. ACM CHI'92 (Monterey, CA, May 1992),
- 369-370.
-
- Ben Shneiderman. Tree visualization with Tree-maps: A 2-d
- space-filling approach. ACM Transaction on Graphics (11)1 (January
- 1992), 92-99.
-
- HCIL Open House '92 one hour video tape.
- HCIL Open House '93 one hour video tape.
-
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-
- This implementation is part of Brian Johnson's Ph.D. work on the visual
- representation of hierarchical information spaces. Persons with
- similar research concerns should contact:
-
- Brian Johnson
- Human-Computer Interaction Laboratory
- Department of Computer Science
- University of Maryland
- College Park, MD 20742
- brianj@cs.umd.edu
-
- --------------------------------------------------------------------------
-
- TreeViz Press Release
-
- New information visualization tool makes hierarchies transparent,
- gives users X-ray vision
-
- The first of a new generation of information visualization tools was
- unveiled by the Human-Computer Interaction Laboratory at the
- University of Maryland. After 2 years of development the algorithms
- that permit color presentation of hierarchical structures have now
- been converted into a program for viewing all of the files and
- directories on a Macintosh hard disk.
-
- Each file appears as a rectangle whose size is proportional to the
- file size, enabling users to spot large files at any level in the
- hierarchy. TreeViz uses color to show file type, e.g. text, picture,
- application, etc. By pointing and clicking a rectangle, TreeViz users
- can bring up detailed information about nodes such as filename, path,
- creation date, etc.
-
- Other options include sound, which offers an additional dimension of
- data revelation. Users can hear the directories and files as they are
- displayed or hear patterns by dragging the mouse. Various scaling
- factors, nesting offsets, depth controls, shape adjustments, shading,
- and size controls complete the list of TreeViz features.
-
- The original concept for TreeViz was developed by Dr. Ben Shneiderman,
- Professor of Computer Science, in response to the common problem of a
- filled hard disk. Since the hard disk in the HCIL was shared by 14
- users it was difficult to determine how and where space was used.
- Finding large files that could be deleted, or even determining which
- users consumed the largest shares of disk space were difficult tasks.
- Finding an effective visualization strategy took only a few months but
- producing a working piece of software took over a year. Brian Johnson
- implemented the algorithms and refined the presentation strategies
- while preserving rapid performance even with 5,000 node hierarchies.
- The TreeViz application runs on all color Macintosh models.
-
- Purchasing and Licensing:
-
- TreeViz Orders
- Office of Technology Liaison
- 4312 Knox Road
- University of Maryland
- College Park, MD 20742.
- (301) 405-4208
- FAX: (301) 314-9871
-
- Submit a US-bank check or money order for US$25 ($30 overseas) made
- out to the Office of Technology Liaison (no cash please.)
-
-
- Other Treemap Implementations:
-
- Avail App Name Platform Author
- ----- ----------- -------- ------
- $25 TreeViz Mac Brian Johnson (bsj@research.att.com)
- FTP Dirviz X John Stasko's Xtango project
- ? dirvis X, openwindows Mark.Gray@cc.gatech.edu
- No ? OpenWindows Dave Turo turo@cs.umd.edu
- ? ? Cross-Platform Marko T. (marko@cs.umd.edu)
- ? ? ? ?Brad Meyers@CMU?
- ? ? ? ?UC Santa Cruz?
- No SeeTree X, (Cross?) Brian Johnson (bsj@research.att.com)
- WWW fsn SGI Joel Tesler & Steve Strasnick
-
- alias fxtango="ftp par.cc.gatech.edu"
-
- Related Cool Stuff:
-
- File System Navigator from SGI
- Cone & Cam Trees from Xerox PARC
- Drum Trees from Univ. Toronto
- 3D VR "treemaps" from Univ. Alberta
-
- The next version of treemaps by the original author (BSJ) will be much
- more general. Most of the traditional tree display techniques
- (including the cool ones mentioned above) can be generated by the
- generalized treemap algorithm, as well as many new and exciting
- displays as yet only available in the 8.5x11 dissertation version.
-
- My dissertation has all of this in it. Serious researchers can
- contact me for a copy - reproduction and mailing aren't free so don't
- ask if you're not going to read all 200+ pages (but with 100+
- illustrations:-).
-
- Brian Johnson. Treemaps: Visualizing Hierarchical and Categorical
- Data, Ph.D. Dissertation, University of Maryland, 1993
-
- My current address:
-
- Brian Johnson Member of Technical Staff Room IHC 1U-328
- AT&T Bell Laboratories 1000 E. Warranville Road Naperville, IL 60566
- bsj@research.att.com 708-713-4070 Fax: 708-713-4982
-
- I've already done 100,000 node hierarchies - quite cool! But then now
- I have an SGI so ... Actually PC hardware is surprisingly fast - just
- get a 19" (1 million pixel) monitor.
-
-