"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.

 

1771 books out of 2807 items checked out at 14:00, 07.16.2017

[2807] Total items checked out [0832] Dewey (non-fiction) Books [0939] Non-Dewey (fiction) Books
[1771] Total Books [0982] Media (dvd, cd, etc.) [0011] 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


  186   [741] Drawing + drawings
  42   [641] Food + drink
  27   [914] Europe
  19   [796] Athletic + outdoor sports + games
  18   [917] North America
  15   [158] Applied psychology
  14   [613] Promotion of health
  14   [364] Criminology
  14   [332] Financial economics
  13   [398] Folklore
  12   [915] Asia
  12   [306] Culture + institutions
  11   [599] Mammalia (Mammals)
  11   [629] Other branches of engineering
  11   [305] Social groups
  10   [895] Literatures of East + Southeast Asia
  10   [782] Vocal music
  10   [616] Diseases
  10   [658] General management
  9   [362] Social welfare problems + services

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