"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.

 

1748 books out of 2934 items checked out at 17:00, 03.01.2018

[2934] Total items checked out [0879] Dewey (non-fiction) Books [0869] Non-Dewey (fiction) Books
[1748] Total Books [1102] Media (dvd, cd, etc.) [0011] 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


  203   [741] Drawing + drawings
  82   [641] Food + drink
  22   [914] Europe
  20   [746] Textile arts
  18   [599] Mammalia (Mammals)
  18   [917] North America
  17   [973] General history of North America United States
  16   [613] Promotion of health
  13   [398] Folklore
  13   [745] Decorative arts
  12   [158] Applied psychology
  11   [294] Religions of Indic origin
  11   [658] General management
  10   [811] Poetry
  10   [616] Diseases
  10   [796] Athletic + outdoor sports + games
  10   [305] Social groups
  10   [635] Garden crops (Horticulture)
  9   [910] Geography + travel
  8   [891] East Indo-European + Celtic

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