"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.

 

1412 books out of 2299 items checked out at 18:00, 07.17.2017

[2299] Total items checked out [0721] Dewey (non-fiction) Books [0691] Non-Dewey (fiction) Books
[1412] Total Books [0858] Media (dvd, cd, etc.) [0008] 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


  200   [741] Drawing + drawings
  55   [641] Food + drink
  16   [914] Europe
  13   [650] Management + auxiliary services
  12   [745] Decorative arts
  12   [796] Athletic + outdoor sports + games
  12   [917] North America
  12   [746] Textile arts
  10   [398] Folklore
  10   [294] Religions of Indic origin
  10   [793] Indoor games + amusements
  10   [306] Culture + institutions
  8   [973] General history of North America United States
  8   [332] Financial economics
  7   [915] Asia
  7   [610] Medical sciences Medicine
  7   [158] Applied psychology
  7   [305] Social groups
  6   [791] Public performances
  6   [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