"Making Visible the Invisible", a data visualization commissioned by the Seattle Central Library, operational since fall 2005


This database receives by the hour all of the checkouts of books, cds, DVDs, and other material that library patrons take out of the library. The data at the library is classified in two separate categories. Non-fiction items receive a Dewey Classfication System coding, explained here: Dewey Decimal Classes. Fictional items are classified in a different way. This visualization features the top 20 most active Dewey categories. Click on each of the categories to get the chronological list of titles checked out during the previous hour.

 

1687 books out of 2737 items checked out at 16:00, 11.16.2017

[2737] Total items checked out [0689] Dewey (non-fiction) Books [0998] Non-Dewey (fiction) Books
[1687] Total Books [0973] Media (dvd, cd, etc.) [0013] Misc

Dewey Decimal Classification Graph

This map highlights current circulating books according to their Dewey classification category in Generalities [0-99]; Philosophy & Psychology[100-199]; Religion [200-299]; Social Science [300-399]; Language [400-499]; Natural Science & Mathematics [500-599]; Technology & Applied Sciences [600-699]; Arts [700-799]; Literature [800-899]; Geography & History [900-999].


     

The top 20 Dewey categories


  146   [741] Drawing + drawings
  33   [641] Food + drink
  15   [398] Folklore
  14   [133] Parapsychology + occultism
  13   [158] Applied psychology
  13   [917] North America
  12   [591] Zoology
  11   [745] Decorative arts
  11   [616] Diseases
  10   [746] Textile arts
  10   [895] Literatures of East + Southeast Asia
  9   [791] Public performances
  9   [973] General history of North America United States
  8   [796] Athletic + outdoor sports + games
  8   [612] Human physiology
  8   [940] General history of Europe
  8   [782] Vocal music
  7   [294] Religions of Indic origin
  7   [747] Interior decoration
  7   [599] Mammalia (Mammals)

Hourly Histogram of Circulation Activities

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George Legrady, with Andreas Schlegel and August Black. This active webpage has been operational since October 2005