"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.

 

1874 books out of 2671 items checked out at 16:00, 03.25.2019

[2671] Total items checked out [0704] Dewey (non-fiction) Books [1170] Non-Dewey (fiction) Books
[1874] Total Books [0717] Media (dvd, cd, etc.) [0006] 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


  48   [741] Drawing + drawings
  44   [641] Food + drink
  29   [551] Geology, hydrology, meteorology
  26   [398] Folklore
  23   [613] Promotion of health
  20   [599] Mammalia (Mammals)
  18   [914] Europe
  16   [973] General history of North America United States
  16   [155] Differential + developmental psychology
  15   [591] Zoology
  15   [636] Animal husbandry
  12   [306] Culture + institutions
  11   [616] Diseases
  10   [979] General history of North America Great Basin + Pacific Slope
  10   [917] North America
  10   [793] Indoor games + amusements
  9   [612] Human physiology
  9   [305] Social groups
  9   [152] Perception, movement, emotions, drives
  9   [791] Public performances

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