I have chosen new resources for assignment 2. The resources were
located through the Digital Library for Earth Science Education (DLESE).
Upon perusing the 10 resources, I came up with the following ratings using
the 4 identified criteria:
| Resources | Consistency | Accuracy | Granularity | Level of Subject Indexing |
| Resource 1 | **** | *** | lower level | summative |
| Resource 2 | **** | *** | lower level | summative |
| Resource 3 | **** | **** | lower level | summative |
| Resource 4 | **** | ** | lower level | summative |
| Resource 5 | **** | *** | lower level | summative |
| Resource 6 | **** | **** | lower level | summative |
| Resource 7 | **** | *** | lower level, but need to input info. to go deeper | summative |
| Resource 8 | **** | ***1/2 | lower level | summative/exhaustive |
| Resource 9 | **** | **** | lower level | summative |
| Resource 10 | *** | ** | lower level | summative |
Key: 1-4 * to show level of consistency; accuracy
(* is least consistent; accurate; **** is most consistent; accurate)
Why I took points off for consistency and accuracy:
Resource 1: Not completely accurate, because the email contact
has changed.
Resource 2: Not completely accurate, because the email contact
has changed.
Resource 3: No points taken off.
Resource 4: Points taken off because email contact has changed; also
the metadata description doesn't point out the very helpful glossary feature.
Resource 5: Not completely accurate, because the email contact has
changed.
Resource 6: No points taken off.
Resource 7: Not completely accurate because the email contact has changed.
Resource 8: 1/2 point taken off because not sure if email address is
presently correct.
Resource 9: No points taken off.
Resource 10: Points taken off because email contact has changed; also
wrong name on metadata."This Dynamic Planet" instead of "This Dynamic Earth".
| Resources | Extent | Controlled Vocabulary | Descriptive | Appropriateness |
| Resource 1 | **** | yes | *** | *** |
| Resource 2 | **** | yes | **** | **** |
| Resource 3 | **** | yes | *** | *** |
| Resource 4 | *** | yes | *** | *** |
| Resource 5 | **** | yes | ** | ** |
| Resource 6 | **** | yes | **** | **** |
| Resource 7 | **** | yes | *** | *** |
| Resource 8 | **** | yes | *** | *** |
| Resource 9 | **** | yes | **** | **** |
| Resource 10 | **** | yes | **** | **** |
Explanation of added criteria:
1. Extent is the amount of detail inherent in the metadata.
It is suggested in the article by Graham.*
2. Controlled Vocabulary is suggested in the article
Understanding Metadata. It is also suggested in the article by
Milstead and Feldman. *
3. Descriptive in this this case is a subjective criteria
for evaluating metadata. It refers to how well the metadata tells
you what is contained in the sources.
4. Appropriateness is suggested in the article Understanding
Metadata. It refers to how appropriate the metadata is to the
users of the sources. * (For the purposes of this paper, how appropriate
it is for educational purposes.)
* see references
For "extent", "descriptive", and "appropriateness", again I have used a system of 1-4* to show level of the criteria I have added. So, in this case, * would be least detailed, descriptive, and appropriate. **** would be most detailed, complete, descriptive, and appropriate.
Why I took off points under "extent", "descriptive", and "appropriateness":
Resource 1: Points taken off under "descriptive" and "appropriateness"
because the metadata for this resource doesn't go the extra mile that some
of the resources I have chose do, and list educational standards.
Resource 3: Points taken off for same reason why it was taken
off resource 1.
Resource 4: Points taken off for same reason why it was taken
off resource 1.
Resource 5: 2 points taken off under "descriptive" and "appropriateness"
because the metadata does not list educational standards, and it is in
my opinion, not as descriptive as the metadata for the other resources.
Resource 7: Points taken off for same reason why it was taken
off resource 1.
Resource 8: Points taken off for same reason why it was taken
off resource 1.
Producing quality metadata is no easy task. The criteria used in this report to evaluate the quality of metadata is not a complete list. I have chosen criteria that I feel are helpful in rating the metadata for this purpose. Other criteria include include the support of interoperability (see Understanding Metadata*); "conformance to expectations" (see Bruce article*); timeliness (see Bruce article*); and the support of the "long term management of objects in collections." (see Understanding Metadata*). And still, this is not a complete list of criteria.
Just as there are subjective elements to metadata; so too evaluating metadata can be subjective. Some inaccuracies may be obvious, as I have noted in the explanation of the first table (title difference, email contact change). Others may not be readily apparent. I have made a subjective judgment when I took off points for not pointing out a glossary feature and not listing educational standards. In my explanation as to why I took off points on resource 5 (see above), I said it was my opinion.
I hope in this paper that I have given an idea about the quality of the resources I have selected; pointed out flaws that can occur; pointed out metadata records that are specially helpful and why; and just generally provided food for thought.
APPENDIX 1
The following web sites taken from:
Digital Library for Earth System Education (n.d.). Retrieved Nov. 27,
2004. Web site: http://www.dlese.org/
1. Visible Earth (n.d.). Retrieved Nov. 27, 2004. Web site: http://visibleearth.nasa.gov/
2. A Close Look at Monterey Bay National Marine Sanctuary (Aug. 2004). Retrieved Nov. 27, 2004. Web site: http://bonita.mbnms.nos.noaa.gov/educate/teachercurriculum/investigation2.html
3. Virtual Vacationland (n.d.). Retrieved Nov. 27, 2004. Web site: http://www.bigelow.org/virtual
4. Earth Observatory (n.d.). Retrieved Nov. 27, 2004. Web site: http://earthbobservatory.nasa.gov
5. Earth Science Picture of the Day (n.d.). Retrieved Nov. 27, 2004. Web site: http://epod.usra.edu
6. Earth Science World Image Bank (2004). Retrieved Nov. 27, 2004. Web site: http://www.earthscienceworld.org/imagebank/index.html
7. Window to My Environment (n.d.). Retrieved Nov. 27, 2004. Web site: http://www.epa.gov/enviro/wme/
8. Earth Update (n.d.). Retrieved Nov. 27, 2004. Web site: http://mtpe.com/mtpe/spheres.html
9. All About Glaciers (n.d.). Retrieved Dec. 2, 2004. Web site: http://nsidc.org/glaciers/
10. Kious, W.J. & Tilling, R.I. (n.d.) This Dynamic Planet: The Story of Plate Tectonics. Retrieved Dec. 2, 2004. Web site: http://pubs.usgs.gov/publications/text/dynamic.html#anchor10790904
Metadata title
10. Kious, W.J. & Tilling, R.I. (n.d.) This Dynamic Earth: The Story of Plate Tectonics. Retrieved Dec. 2, 2004. Web site: http://pubs.usgs.gov/publications/text/dynamic.html#anchor10790904
Actual title
REFERENCES
Some of these references were directly drawn from, and the rest I perused
and came up with ideas for the added criteria that can be used to evaluate
metadata. Sources directly drawn from are noted with an asterisk
(*).
Barton, J., Currier, S., and Hey, J.M.N. (2003). Building Quality
Assurance into Metadata Creation: An Analysis Based on the Learning Objects
and
e-Prints Communities of Practice. Dublin Core Conference,
Seattle, WA. Web site: http://www.siderean.com/dc2003/201_paper60.pdf
Bruce, T. (2004, May 21). The Continuum of Quality: Defining, Expressing, and Exploiting Metadata. Web site: http://metadata-wg.mannlib.cornell.edu/forum/index.php?date=2004-05-21
Coleman, A. (2004). Guide to Selecting and Cataloging Quality WWW
Resources for the Small Library. Fairfield, CA: Learning Resources
Association of the
California Community Colleges.
Coleman, A., deCharon, A., Frost, C. O., Ginger. K., & Raskin, R. (last update: 2004, Oct. 15). A Framework for the Future of Educational Digital Libraries: Metadata and Vocabularies for Learning. Retrieved Nov. 27, 2004, from IRLS 501 WebCT.
Graham. P. (1990). Quality in Cataloging: Making Distinctions. Journal of Academic Librarianship, 16, 213-218.
Milstead, J. & Feldman, S. (1999). Metadata: Cataloging by Any Other Name... Web site: http://www.cbuc.es/5digital/1.pdf
Task Force on Metadata and the Cataloging Rules: Final Report
(1998). Committee on Cataloging: Description and Access. Web site:
http://archive.ala.org/alcts/organization/ccs/ccda/tf-tei5.html
Taylor, A. (2004). The Organization of Information (2nd ed.). Westport, CT: Libraries Unlimited, Inc.
Understanding Metadata (2004). Bethesda, MD: NISO Press.
Retrieved Nov. 27, 2004 from NISO web site:
http://www.niso.org