"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.

 

1643 books out of 2840 items checked out at 17:00, 02.24.2018

[2840] Total items checked out [0763] Dewey (non-fiction) Books [0880] Non-Dewey (fiction) Books
[1643] Total Books [1102] Media (dvd, cd, etc.) [0020] 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


  167   [741] Drawing + drawings
  63   [641] Food + drink
  20   [398] Folklore
  19   [917] North America
  13   [613] Promotion of health
  13   [5] Computer programming
  12   [796] Athletic + outdoor sports + games
  12   [599] Mammalia (Mammals)
  11   [597] Cold-blooded vertebrates Fishes
  11   [158] Applied psychology
  10   [305] Social groups
  10   [914] Europe
  9   [612] Human physiology
  9   [616] Diseases
  9   [591] Zoology
  9   [658] General management
  9   [791] Public performances
  8   [636] Animal husbandry
  8   [635] Garden crops (Horticulture)
  8   [155] Differential + developmental psychology

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