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Accessible Graphicson the
World Wide Web
Dan J. GraumanInformation Technology Specialist
National Cancer Institute, [email protected]
Salt Lake City, UtahMarch 13, 2003
Interface 2003:Security and Infrastructure Protection
35th Symposium on the Interface
Topics
• Accessibility
• Background (Atlas)
• The Atlas Web site Online atlas Customizable maps Interactive graphs
• Discussion
Accessibility requirements* as ofJune 21, 2001
http://section508.gov/
Section 508 requires that Federal agencies’ electronicand information technology is accessible to peoplewith disabilities.
* Section 508 of the Rehabilitation Act of 1973, as amended 29 U.S.C § 794 (d)
Excellent resource: http://usability.gov/
Some statistics
An estimated 20% of the population inthe United States has some kind ofdisability, and 10% has a severedisability. Those individuals withsevere disabilities are limited in theway that they can use the Internet.
The Pew study found that 62% ofInternet users, or 73 million Americans,have gone online for health information.About 6 million use it on a given day –more than those who visit healthprofessionals.
According to Harris Interactive, 80% ofonline adults (110 million people) lookfor health information online. Thiscompares with 54 million in 1998, 69million in 1999, and 97 million in 2001.
What do we “see” on the Web?
This is what the SIGHTED user sees
What do we “see” on the Web?
This is what the VISUALLY-IMPAIRED user sees
What do we “see” on the Web?
This is what the BLIND user sees
• Text• Static graphics (pictures)• Dynamic graphs• Multimedia• Tables• Forms• Geospatial data (maps)
What are the main elementsthat can be found on a Web page?
Most difficult
EasiestRequires more effort
• Text• Static graphics (pictures)• Dynamic graphs• Multimedia• Tables• Forms• Geospatial data (maps)
How easily can these elements be made accessible to people with disabilities?
Examples of adaptive / assistive technology products
Low vision: software products
Magnification+
Screen reading
Magnification+
Screen reading
Examples of adaptive / assistive technology products
Low vision: hardware products
Hand-held magnification
Examples of adaptive / assistive technology products
Blindness: software products
Screen readers
Screen & Braille output
Examples of adaptive / assistive technology products
Blindness: hardware products
Braille displays
Examples of adaptive / assistive technology products
Blindness: hardware products
Braille embossers
Background (Atlas)
• Published in December 1999• Cancer mortality maps• Text & references• Tables & figures
Online atlas
Electronic version of book enabling user toview / print / download text, maps, graphscontained in the Atlas
“Home Page” for each cancer
User can read the text summary for a specificcancer, view / download maps or data, obtainhealth information for that cancer, and link tothe interactive graphs and customizable maps
Example of text summary
Customizable maps
Here users can generate maps not availablein the Atlas, zoom in on a region or state,animate rates over time
Input interface
Lung cancer, WM, 1970-94 (state)(monochrome)
Lung cancer, WM, 1970-94 (state)(Atlas colors)
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (SEA)
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (county)
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (county) – highest 25%
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (county) – highest 10%
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (county) – highest 5%
Text version (partial) of map (d link)
Lung cancer, WM, 1970-94 (county) – highest 1%
Text version (partial) of map (d link)
Animation
1950-54
Lung cancer by state economic areaWhite males (common scale over time)
1955-59
Lung cancer by state economic areaWhite males (common scale over time)
1960-64
Lung cancer by state economic areaWhite males (common scale over time)
1965-69
Lung cancer by state economic areaWhite males (common scale over time)
1970-74
Lung cancer by state economic areaWhite males (common scale over time)
1975-79
Lung cancer by state economic areaWhite males (common scale over time)
1980-84
Lung cancer by state economic areaWhite males (common scale over time)
1985-89
Lung cancer by state economic areaWhite males (common scale over time)
1990-94
Lung cancer by state economic areaWhite males (common scale over time)
Interactive graphs
Electronic version of book enabling user toview / print / download text, maps, graphscontained in the Atlas
Rates by cancer
Parameter selection interface
Radio buttons enable userto navigate within andacross categories by useof the arrow and Tab keys
All cancers - rates by cancer (US by state)
Text version (partial) of graph (d link)
Discussion
