"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.

 

1424 books out of 2077 items checked out at 16:00, 03.26.2019

[2077] Total items checked out [0560] Dewey (non-fiction) Books [0864] Non-Dewey (fiction) Books
[1424] Total Books [0561] Media (dvd, cd, etc.) [0004] 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


  64   [741] Drawing + drawings
  43   [641] Food + drink
  13   [364] Criminology
  12   [616] Diseases
  12   [398] Folklore
  11   [917] North America
  10   [155] Differential + developmental psychology
  10   [158] Applied psychology
  9   [363] Other social problems + services
  9   [796] Athletic + outdoor sports + games
  8   [940] General history of Europe
  8   [973] General history of North America United States
  8   [895] Literatures of East + Southeast Asia
  7   [635] Garden crops (Horticulture)
  7   [305] Social groups
  7   [621] Applied physics
  7   [814] Essays
  7   [791] Public performances
  6   [613] Promotion of health
  6   [248] Christian experience, practice, life

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