"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.

 

1184 books out of 1975 items checked out at 14:00, 09.19.2017

[1975] Total items checked out [0494] Dewey (non-fiction) Books [0690] Non-Dewey (fiction) Books
[1184] Total Books [0758] Media (dvd, cd, etc.) [0005] 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


  64   [741] Drawing + drawings
  43   [641] Food + drink
  26   [398] Folklore
  16   [811] Poetry
  13   [158] Applied psychology
  12   [796] Athletic + outdoor sports + games
  11   [914] Europe
  9   [658] General management
  9   [428] Standard English usage
  8   [940] General history of Europe
  8   [629] Other branches of engineering
  8   [599] Mammalia (Mammals)
  7   [305] Social groups
  7   [808] Rhetoric + collections of literature
  7   [917] North America
  6   [597] Cold-blooded vertebrates Fishes
  6   [153] Mental processes + intelligence
  6   [793] Indoor games + amusements
  6   [612] Human physiology
  6   [973] General history of North America United States

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