"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.

 

1405 books out of 2131 items checked out at 12:00, 07.12.2017

[2131] Total items checked out [0600] Dewey (non-fiction) Books [0805] Non-Dewey (fiction) Books
[1405] Total Books [0692] Media (dvd, cd, etc.) [0010] 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


  92   [741] Drawing + drawings
  53   [641] Food + drink
  19   [398] Folklore
  18   [613] Promotion of health
  14   [597] Cold-blooded vertebrates Fishes
  11   [306] Culture + institutions
  11   [796] Athletic + outdoor sports + games
  9   [616] Diseases
  9   [305] Social groups
  8   [158] Applied psychology
  8   [791] Public performances
  8   [811] Poetry
  8   [747] Interior decoration
  7   [746] Textile arts
  7   [658] General management
  7   [629] Other branches of engineering
  7   [910] Geography + travel
  7   [618] Gynecology + other medical specialities
  6   [973] General history of North America United States
  6   [940] General history of Europe

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