"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.

 

1110 books out of 1841 items checked out at 16:00, 07.21.2017

[1841] Total items checked out [0537] Dewey (non-fiction) Books [0573] Non-Dewey (fiction) Books
[1110] Total Books [0706] Media (dvd, cd, etc.) [0008] 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


  161   [741] Drawing + drawings
  19   [641] Food + drink
  15   [398] Folklore
  13   [914] Europe
  11   [917] North America
  11   [796] Athletic + outdoor sports + games
  9   [306] Culture + institutions
  8   [814] Essays
  8   [598] Aves (Birds)
  7   [613] Promotion of health
  7   [649] Child rearing + home care of sick
  7   [591] Zoology
  7   [919] Other areas
  7   [305] Social groups
  6   [791] Public performances
  6   [323] Civil + political rights
  6   [979] General history of North America Great Basin + Pacific Slope
  5   [970] General history of North America
  5   [621] Applied physics
  5   [362] Social welfare problems + services

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