"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.

 

1400 books out of 2151 items checked out at 15:00, 03.01.2018

[2151] Total items checked out [0657] Dewey (non-fiction) Books [0743] Non-Dewey (fiction) Books
[1400] Total Books [0686] 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


  105   [741] Drawing + drawings
  30   [641] Food + drink
  25   [746] Textile arts
  17   [914] Europe
  16   [796] Athletic + outdoor sports + games
  16   [635] Garden crops (Horticulture)
  15   [305] Social groups
  15   [155] Differential + developmental psychology
  14   [158] Applied psychology
  11   [649] Child rearing + home care of sick
  11   [917] North America
  10   [599] Mammalia (Mammals)
  10   [612] Human physiology
  9   [613] Promotion of health
  9   [618] Gynecology + other medical specialities
  9   [362] Social welfare problems + services
  8   [973] General history of North America United States
  8   [658] General management
  8   [895] Literatures of East + Southeast Asia
  7   [940] General history of Europe

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