Observations

Data

• Server http://geo-nsdi.er.usgs.gov/
• 142 day record 7 January through 28 May 2003
• 1117 metadata records

Results

Downloads by HTTP	102,945
Downloads by Z39.50	1,180
HTTP/Z39.50 overall	87:1
Median daily ratio	140:1
Z39.50 searches on fields we don't have	40%
- on ISBN alone	32%

Conclusions

• Clearinghouse search works but people don't use it
• Z39.50 servers are busy responding to irrelevant requests
• How do people reach the metadata?
  1. Google
  2. Local browse and search
  3. Yahoo
  4. Ask.com
  5. MSN