"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.

 

1319 books out of 2170 items checked out at 17:00, 07.19.2017

[2170] Total items checked out [0593] Dewey (non-fiction) Books [0726] Non-Dewey (fiction) Books
[1319] Total Books [0825] Media (dvd, cd, etc.) [0006] 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


  182   [741] Drawing + drawings
  34   [641] Food + drink
  18   [917] North America
  14   [914] Europe
  13   [613] Promotion of health
  13   [305] Social groups
  11   [306] Culture + institutions
  11   [796] Athletic + outdoor sports + games
  8   [973] General history of North America United States
  8   [158] Applied psychology
  7   [940] General history of Europe
  7   [979] General history of North America Great Basin + Pacific Slope
  6   [523] Specific celestial bodies + phenomena
  6   [612] Human physiology
  6   [746] Textile arts
  6   [332] Financial economics
  6   [398] Folklore
  6   [658] General management
  6   [915] Asia
  5   [636] Animal husbandry

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