Global 'Dead-End' Public University Course Catalog URL Drift
How quickly public university course catalog URLs become inaccessible worldwide.
- Observations
- 36
- Tracking since
- Last updated
Percentage of course catalog URLs returning 404 or 410
The proportion of public university course catalog URLs that return HTTP 404 or 410 status codes
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| 03 Sep |
Darker = higher percentage of course catalog urls returning 404 or 410. Empty cells are hours with no collection.
| When | Percentage of course catalog URLs returning 404 or 410 |
|---|---|
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% |
Median response time for accessible course catalog URLs
The median time in hours taken for accessible course catalog URLs to respond
| 0 | 6 | 12 | 18 | |||||||||||||||||||||
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| 03 Sep |
Darker = higher median response time for accessible course catalog urls. Empty cells are hours with no collection.
| When | Median response time for accessible course catalog URLs |
|---|---|
| 0 hours | |
| 0.001 hours | |
| 0 hours | |
| 0.001 hours | |
| 0.001 hours | |
| 0 hours | |
| 0.002 hours | |
| 0.001 hours | |
| 0.002 hours | |
| 0.001 hours | |
| 0.002 hours | |
| 0.002 hours |
Percentage of URLs with redirect chains exceeding 3 hops
The proportion of course catalog URLs that require more than 3 redirects to reach the final destination
| 0 | 6 | 12 | 18 | |||||||||||||||||||||
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| 03 Sep |
Darker = higher percentage of urls with redirect chains exceeding 3 hops. Empty cells are hours with no collection.
| When | Percentage of URLs with redirect chains exceeding 3 hops |
|---|---|
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 100.0% | |
| 100.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 0.0% | |
| 100.0% |
About this data
This page tracks the decay of public university course catalog URLs, measuring how often they return errors or excessive redirects. The data comes from systematic scans of course catalog pages across institutions globally, revealing patterns of institutional neglect in digital maintenance. By quantifying URL drift, it highlights the fragility of academic web resources and the need for better preservation practices.
Sources
Every figure on this page was read from these pages.
Why this isn't published anywhere else
While there are resources on scraping or accessing university course catalogs, none of the results indicate systematic tracking of URL decay or 'dead-end' catalog links across public universities globally.
Uniqueness score 0.90 — assessed against live web search results when this subject was created.