"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.

 

0148 books out of 0250 items checked out at 10:00, 02.25.2018
[0250] Total items checked out [0037] Dewey (non-fiction) Books [0111] Non-Dewey (fiction) Books
[0148] Total Books [0102] Media (dvd, cd, etc.) [0000] 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
  10   [741] Drawing + drawings
  4   [363] Other social problems + services
  2   [355] Military science
  2   [976] General history of North America South central United States
  1   [751] Techniques, equipment, forms
  1   [28] Reading, use of other information media
  1   [70] News media, journalism, publishing
  1   [614] Incidence + prevention of disease
  1   [629] Other branches of engineering
  1   [636] Animal husbandry
  1   [364] Criminology
  1   [346] Private law
  1   [362] Social welfare problems + services
  1   [818] Miscellaneous writings
  1   [811] Poetry
  1   [306] Culture + institutions
  1   [792] Stage presentations
  1   [771] Techniques, equipment, materials
  1   [770] Photography + photographs
  1   [758] Other subjects

Hourly Histogram of Circulation Activities
View a Previous Date | 02.21 | 02.22 | 02.23 | 02.24 | 02.25 | 02.26 | 02.27 | 02.28 | 03.01 |

George Legrady, with Andreas Schlegel and August Black. This active webpage has been operational since October 2005