"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.

 

1774 books out of 3070 items checked out at 15:00, 11.22.2017

[3070] Total items checked out [0781] Dewey (non-fiction) Books [0993] Non-Dewey (fiction) Books
[1774] Total Books [1188] 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


  202   [741] Drawing + drawings
  44   [641] Food + drink
  22   [796] Athletic + outdoor sports + games
  19   [398] Folklore
  19   [747] Interior decoration
  14   [658] General management
  14   [940] General history of Europe
  12   [612] Human physiology
  11   [746] Textile arts
  10   [616] Diseases
  9   [158] Applied psychology
  9   [305] Social groups
  9   [153] Mental processes + intelligence
  9   [629] Other branches of engineering
  8   [915] Asia
  8   [613] Promotion of health
  8   [306] Culture + institutions
  8   [362] Social welfare problems + services
  7   [332] Financial economics
  7   [782] Vocal music

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