"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.

 

1799 books out of 3001 items checked out at 16:00, 02.20.2018

[3001] Total items checked out [0779] Dewey (non-fiction) Books [1020] Non-Dewey (fiction) Books
[1799] Total Books [1065] Media (dvd, cd, etc.) [0052] 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


  181   [741] Drawing + drawings
  55   [641] Food + drink
  22   [914] Europe
  21   [333] Land economics
  21   [917] North America
  18   [305] Social groups
  17   [613] Promotion of health
  17   [398] Folklore
  16   [158] Applied psychology
  14   [616] Diseases
  12   [796] Athletic + outdoor sports + games
  10   [811] Poetry
  10   [973] General history of North America United States
  8   [618] Gynecology + other medical specialities
  8   [891] East Indo-European + Celtic
  7   [155] Differential + developmental psychology
  7   [636] Animal husbandry
  7   [635] Garden crops (Horticulture)
  7   [646] Sewing, clothing, personal living
  6   [153] Mental processes + intelligence

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