"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.

 

2291 books out of 3218 items checked out at 15:00, 03.24.2019

[3218] Total items checked out [0876] Dewey (non-fiction) Books [1415] Non-Dewey (fiction) Books
[2291] Total Books [0816] Media (dvd, cd, etc.) [0010] 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


  98   [741] Drawing + drawings
  50   [641] Food + drink
  41   [599] Mammalia (Mammals)
  22   [398] Folklore
  22   [597] Cold-blooded vertebrates Fishes
  20   [613] Promotion of health
  19   [595] Other invertebrates
  18   [591] Zoology
  16   [914] Europe
  16   [158] Applied psychology
  16   [636] Animal husbandry
  15   [796] Athletic + outdoor sports + games
  14   [917] North America
  14   [746] Textile arts
  12   [523] Specific celestial bodies + phenomena
  12   [305] Social groups
  12   [155] Differential + developmental psychology
  11   [811] Poetry
  11   [793] Indoor games + amusements
  9   [649] Child rearing + home care of sick

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