"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.
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0910 books out of 1194 items checked
out at 10:00, 02.22.2026 |
| [1194] Total items checked out |
[0280] Dewey (non-fiction) Books |
[0630] Non-Dewey (fiction) Books |
| [0910] Total Books |
[0199] Media (dvd, cd, etc.) |
[0011] Misc |
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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].
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Hourly Histogram of Circulation Activities
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View a Previous Date |
02.18 |
02.19 |
02.20 |
02.21 |
02.22 |
02.23 |
02.24 |
02.25 |
02.26 |
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George Legrady, with Andreas Schlegel and August Black. This active webpage has been operational since October 2005
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