"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.

 

2026 books out of 3297 items checked out at 15:00, 02.24.2018

[3297] Total items checked out [0958] Dewey (non-fiction) Books [1068] Non-Dewey (fiction) Books
[2026] Total Books [1131] Media (dvd, cd, etc.) [0017] 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


  183   [741] Drawing + drawings
  72   [641] Food + drink
  26   [914] Europe
  25   [613] Promotion of health
  25   [595] Other invertebrates
  19   [158] Applied psychology
  18   [973] General history of North America United States
  17   [616] Diseases
  16   [398] Folklore
  16   [332] Financial economics
  15   [305] Social groups
  14   [612] Human physiology
  14   [796] Athletic + outdoor sports + games
  14   [917] North America
  13   [745] Decorative arts
  12   [658] General management
  11   [598] Aves (Birds)
  11   [751] Techniques, equipment, forms
  10   [306] Culture + institutions
  10   [791] Public performances

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