"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.

 

1704 books out of 2627 items checked out at 14:00, 03.24.2019

[2627] Total items checked out [0707] Dewey (non-fiction) Books [0997] Non-Dewey (fiction) Books
[1704] Total Books [0811] Media (dvd, cd, etc.) [0015] 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


  86   [741] Drawing + drawings
  42   [641] Food + drink
  20   [305] Social groups
  20   [973] General history of North America United States
  18   [599] Mammalia (Mammals)
  16   [636] Animal husbandry
  16   [914] Europe
  15   [917] North America
  14   [796] Athletic + outdoor sports + games
  13   [158] Applied psychology
  12   [791] Public performances
  10   [658] General management
  10   [398] Folklore
  10   [629] Other branches of engineering
  9   [591] Zoology
  9   [613] Promotion of health
  9   [616] Diseases
  9   [688] Other final products + packaging
  8   [635] Garden crops (Horticulture)
  7   [746] Textile arts

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