"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.

 

2643 books out of 4351 items checked out at 15:00, 03.03.2018

[4351] Total items checked out [1249] Dewey (non-fiction) Books [1394] Non-Dewey (fiction) Books
[2643] Total Books [1587] Media (dvd, cd, etc.) [0007] 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


  253   [741] Drawing + drawings
  99   [641] Food + drink
  34   [796] Athletic + outdoor sports + games
  28   [158] Applied psychology
  27   [914] Europe
  26   [398] Folklore
  24   [917] North America
  21   [613] Promotion of health
  19   [746] Textile arts
  19   [616] Diseases
  18   [973] General history of North America United States
  18   [305] Social groups
  18   [599] Mammalia (Mammals)
  17   [745] Decorative arts
  17   [306] Culture + institutions
  16   [759] Historical, areas, persons treatment
  15   [658] General management
  14   [791] Public performances
  12   [940] General history of Europe
  11   [332] Financial economics

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