"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.

 

1631 books out of 2672 items checked out at 13:00, 07.22.2017

[2672] Total items checked out [0742] Dewey (non-fiction) Books [0889] Non-Dewey (fiction) Books
[1631] Total Books [1000] Media (dvd, cd, etc.) [0012] 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


  206   [741] Drawing + drawings
  41   [641] Food + drink
  22   [914] Europe
  21   [917] North America
  20   [796] Athletic + outdoor sports + games
  17   [613] Promotion of health
  14   [658] General management
  14   [616] Diseases
  12   [523] Specific celestial bodies + phenomena
  10   [636] Animal husbandry
  9   [811] Poetry
  8   [629] Other branches of engineering
  8   [973] General history of North America United States
  7   [793] Indoor games + amusements
  7   [635] Garden crops (Horticulture)
  7   [158] Applied psychology
  7   [364] Criminology
  7   [791] Public performances
  7   [363] Other social problems + services
  7   [612] Human physiology

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