"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.

 

1914 books out of 2858 items checked out at 16:00, 06.16.2019

[2858] Total items checked out [0742] Dewey (non-fiction) Books [1172] Non-Dewey (fiction) Books
[1914] Total Books [0866] Media (dvd, cd, etc.) [0016] 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


  99   [741] Drawing + drawings
  62   [641] Food + drink
  28   [796] Athletic + outdoor sports + games
  19   [917] North America
  16   [305] Social groups
  16   [613] Promotion of health
  16   [158] Applied psychology
  14   [398] Folklore
  14   [155] Differential + developmental psychology
  13   [914] Europe
  13   [658] General management
  11   [791] Public performances
  11   [294] Religions of Indic origin
  11   [616] Diseases
  10   [973] General history of North America United States
  9   [306] Culture + institutions
  9   [599] Mammalia (Mammals)
  8   [746] Textile arts
  8   [915] Asia
  8   [891] East Indo-European + Celtic

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