"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.

 

1583 books out of 2283 items checked out at 11:00, 07.27.2017

[2283] Total items checked out [0523] Dewey (non-fiction) Books [1060] Non-Dewey (fiction) Books
[1583] Total Books [0667] 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


  144   [741] Drawing + drawings
  31   [641] Food + drink
  20   [398] Folklore
  11   [613] Promotion of health
  11   [523] Specific celestial bodies + phenomena
  11   [616] Diseases
  11   [306] Culture + institutions
  10   [917] North America
  8   [811] Poetry
  8   [940] General history of Europe
  7   [796] Athletic + outdoor sports + games
  6   [599] Mammalia (Mammals)
  6   [305] Social groups
  6   [294] Religions of Indic origin
  5   [973] General history of North America United States
  5   [650] Management + auxiliary services
  5   [364] Criminology
  5   [649] Child rearing + home care of sick
  5   [551] Geology, hydrology, meteorology
  5   [158] Applied psychology

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