"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.

 

0844 books out of 1392 items checked out at 19:00, 02.26.2018

[1392] Total items checked out [0465] Dewey (non-fiction) Books [0379] Non-Dewey (fiction) Books
[0844] Total Books [0507] Media (dvd, cd, etc.) [0003] 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


  116   [741] Drawing + drawings
  22   [979] General history of North America Great Basin + Pacific Slope
  19   [641] Food + drink
  15   [978] General history of North America Western United States
  14   [973] General history of North America United States
  12   [882] Classical Greek drama
  11   [650] Management + auxiliary services
  10   [306] Culture + institutions
  9   [158] Applied psychology
  8   [746] Textile arts
  7   [616] Diseases
  7   [398] Folklore
  6   [332] Financial economics
  6   [599] Mammalia (Mammals)
  6   [305] Social groups
  5   [914] Europe
  5   [974] General history of North America Northeastern United States
  5   [791] Public performances
  5   [818] Miscellaneous writings
  5   [613] Promotion of health

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