. An extension to the treemap method for the visualization of hierarchical information, such as directory structures and organization structures, is presented. The standard treemap method often gives thin, elongated rectangles. As a result, rectangles are difficult to compare and to select. A new method is presented to generate lay-outs in which the rectangles approximate squares. To strenghten the visualization of the structure, shaded frames are used around groups of related nodes. 1 Introduction Hierarchical structures of information are everywhere: directory structures, organization structures, family trees, catalogues, computer programs, and so on. Small hierarchical structures are effective to locate information, but the content and organization of large structures is harder to grasp. We present a new visualization method for large hierarchical structures: Squarified Treemaps. The method is based on Treemaps, developed by Shneiderman and Johnson [9, 6]. Treemaps are effic...

A new method is presented for the visualization of hierarchical information, such as directory structures and organization structures. Cushion treemaps inherit the elegance of standard treemaps: compact, space-filling displays of hierarchical information, based on recursive subdivision of a rectangular image space. Intuitive shading is used to provide insight in the hierarchical structure. During the subdivision ridges are added per rectangle, which are rendered with a simple shading model. The result is a surface that consists of recursive cushions. The method is efficient, effective, easy to use and implement, and has a wide applicability. 1 Introduction Hierarchical structures of information are ubiquitous: family trees, directory structures, organization structures, catalogues, computer programs, etcetera. Small hierarchical structures are very effective to locate information, but the content and organization of large structures is much harder to grasp. We present a new visualiza...

Radial, space-filling (RSF) techniques for hierarchy visualization have several advantages over traditional node-link diagrams, including the ability to efficiently use the display space while effectively conveying the hierarchy structure. Several RSF systems and tools have been developed to date, each with varying degrees of support for interactive operations such as selection and navigation. In this paper, we describe what we believe to be a complete set of desirable operations on hierarchical structures. We then present InterRing, an RSF hierarchy visualization system that supports a significantly more extensive set of these operations than prior systems. In particular, InterRing supports multi-focus distortions, interactive hierarchy reconfiguration, and both semi-automated and manual selection. We show the power and utility of these and other operations, and describe our on-going efforts to evaluate their effectiveness and usability.

internationaler The Chicago Manual of Style. Het voorbeeld in paragraaf 2.6.1 is niet correct: \bf opdrachten zijn weggevallen. Bij de paragraaf over invoertekens, 2.3, had aangegeven moeten worden hoe de backslash zelf gezet kan worden in de tekst en in voetnoten e.d. In het algemeen moet aangegeven worden hoe in titels, voetnoten e.d. verbatim tekst opgenomen kan worden. Het gebruik van \section*{...} versus het globale aanduiden van het onderdrukken van nummering via \setcounter... moet besproken worden. Naast de L AT E X standaard stijlen zijn er nu diverse andere stijlen beschikbaar, o.a. de Nederlandse stijlen, en internationaler AMS-L AT E X, en TUGboat's LTUGboat.sty. Ingegaan had kunnen wordenop de basis structuren van paragrafen zoals behandeld door Wittbecker (1988). Ook zou een verwijzing gegeven kunnen worden over het creeren van endnotes. Zoals bekend werken Frank Mittelbach, Rainer Schopf, Chris Rowley, Johannes Braams en anderen aan een nieuwe versie van L AT

This paper describes a new approach for visualising the file structures. Our technique uses an enclosure + connection (ENCCON) approach that provides an overall view of the entire file/directory hierarchy that gives a better understanding of the folder-folder and folder-file relationships, and therefore makes easier for the navigation. We firstly use the rectangular regions to present the folders. This allows the user to immediately percept the location, size (number of files contained) and other properties of any particular folder. To enrich the visual attributes of the file structure, we also use a node- link diagram to present the " belonging" relationships. This " belonging" relationship includes folder-folder and folder-file relationships. We use a semantic zooming technique to enlarge the display of files and folders in a particular focused area. The animation is also accommodated in order to preserve the mental map [Bartram 1997] during the navigation.

Abstract- The HierarchyMap describes a novel approach for Treemap Visualization method for representing large volume of hierarchical information on a 2-dimensional space. HierarchyMap algorithm is a new ordered treemap algorithm. Results of the implementation of HierarchyMap treemap algorithm show that it is capable of representing several thousands of hierarchical data on 2-dimensional space on a computer and Portable Device Application (PDA) screens while still maintaining the qualities found in existing treemap algorithms such as readability, low aspect ratio, reduced run time, and reduced number of thin rectangles. The HierarchyMap treemap algorithm is implemented in Java programming language and tested with dataset of