"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.

 

1634 books out of 2502 items checked out at 16:00, 07.24.2017

[2502] Total items checked out [0781] Dewey (non-fiction) Books [0853] Non-Dewey (fiction) Books
[1634] Total Books [0826] Media (dvd, cd, etc.) [0016] 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


  182   [741] Drawing + drawings
  62   [641] Food + drink
  23   [398] Folklore
  23   [599] Mammalia (Mammals)
  18   [914] Europe
  15   [613] Promotion of health
  14   [973] General history of North America United States
  14   [523] Specific celestial bodies + phenomena
  13   [812] Drama
  13   [595] Other invertebrates
  11   [917] North America
  10   [746] Textile arts
  10   [635] Garden crops (Horticulture)
  10   [629] Other branches of engineering
  9   [616] Diseases
  8   [597] Cold-blooded vertebrates Fishes
  8   [306] Culture + institutions
  8   [796] Athletic + outdoor sports + games
  7   [709] Historical, areas, persons treatment
  6   [378] Higher education

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