"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.

 

1970 books out of 3227 items checked out at 15:00, 11.18.2017

[3227] Total items checked out [0889] Dewey (non-fiction) Books [1081] Non-Dewey (fiction) Books
[1970] Total Books [1187] 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


  244   [741] Drawing + drawings
  77   [641] Food + drink
  38   [398] Folklore
  24   [613] Promotion of health
  13   [158] Applied psychology
  12   [746] Textile arts
  12   [305] Social groups
  11   [649] Child rearing + home care of sick
  11   [152] Perception, movement, emotions, drives
  10   [917] North America
  10   [791] Public performances
  9   [616] Diseases
  8   [973] General history of North America United States
  8   [363] Other social problems + services
  8   [303] Social processes
  7   [736] Carving + carvings
  7   [811] Poetry
  7   [658] General management
  7   [796] Athletic + outdoor sports + games
  7   [623] Military + nautical engineering

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