"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.

 

2247 books out of 3468 items checked out at 16:00, 07.23.2017

[3468] Total items checked out [0959] Dewey (non-fiction) Books [1288] Non-Dewey (fiction) Books
[2247] Total Books [1189] Media (dvd, cd, etc.) [0013] 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


  242   [741] Drawing + drawings
  70   [641] Food + drink
  22   [305] Social groups
  20   [917] North America
  19   [398] Folklore
  19   [914] Europe
  13   [613] Promotion of health
  13   [658] General management
  13   [796] Athletic + outdoor sports + games
  12   [158] Applied psychology
  11   [746] Textile arts
  11   [306] Culture + institutions
  10   [155] Differential + developmental psychology
  10   [294] Religions of Indic origin
  9   [646] Sewing, clothing, personal living
  9   [973] General history of North America United States
  9   [818] Miscellaneous writings
  9   [523] Specific celestial bodies + phenomena
  9   [791] Public performances
  8   [599] Mammalia (Mammals)

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