"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.

 

1504 books out of 2502 items checked out at 17:00, 03.16.2019

[2502] Total items checked out [0668] Dewey (non-fiction) Books [0836] Non-Dewey (fiction) Books
[1504] Total Books [0916] Media (dvd, cd, etc.) [0009] 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


  101   [741] Drawing + drawings
  61   [641] Food + drink
  16   [158] Applied psychology
  16   [597] Cold-blooded vertebrates Fishes
  16   [612] Human physiology
  15   [599] Mammalia (Mammals)
  12   [613] Promotion of health
  12   [305] Social groups
  12   [629] Other branches of engineering
  12   [796] Athletic + outdoor sports + games
  11   [658] General management
  11   [398] Folklore
  9   [791] Public performances
  9   [895] Literatures of East + Southeast Asia
  9   [917] North America
  8   [5] Computer programming
  8   [616] Diseases
  7   [973] General history of North America United States
  7   [746] Textile arts
  7   [153] Mental processes + intelligence

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