"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.

 

2067 books out of 3138 items checked out at 15:00, 03.04.2018

[3138] Total items checked out [0911] Dewey (non-fiction) Books [1156] Non-Dewey (fiction) Books
[2067] Total Books [0971] Media (dvd, cd, etc.) [0009] 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


  159   [741] Drawing + drawings
  66   [641] Food + drink
  29   [599] Mammalia (Mammals)
  23   [914] Europe
  21   [746] Textile arts
  17   [917] North America
  16   [973] General history of North America United States
  15   [940] General history of Europe
  14   [613] Promotion of health
  14   [597] Cold-blooded vertebrates Fishes
  14   [612] Human physiology
  13   [745] Decorative arts
  13   [796] Athletic + outdoor sports + games
  13   [759] Historical, areas, persons treatment
  13   [398] Folklore
  12   [791] Public performances
  11   [305] Social groups
  10   [158] Applied psychology
  10   [635] Garden crops (Horticulture)
  10   [306] Culture + institutions

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