"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.

 

1760 books out of 2685 items checked out at 16:00, 03.09.2019

[2685] Total items checked out [0740] Dewey (non-fiction) Books [1020] Non-Dewey (fiction) Books
[1760] Total Books [0824] 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


  67   [741] Drawing + drawings
  64   [641] Food + drink
  29   [296] Judaism
  19   [914] Europe
  19   [305] Social groups
  18   [636] Animal husbandry
  18   [658] General management
  16   [796] Athletic + outdoor sports + games
  14   [917] North America
  13   [158] Applied psychology
  13   [973] General history of North America United States
  13   [362] Social welfare problems + services
  11   [793] Indoor games + amusements
  11   [746] Textile arts
  11   [811] Poetry
  11   [306] Culture + institutions
  10   [792] Stage presentations
  10   [650] Management + auxiliary services
  10   [613] Promotion of health
  10   [155] Differential + developmental 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