OSGeodata: Unterschied zwischen den Versionen
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** Open source software see [http://www.openarchives.org/tools/tools.html OAI-PMH tools] | ** Open source software see [http://www.openarchives.org/tools/tools.html OAI-PMH tools] | ||
** Gateways available from publishing files to others | ** Gateways available from publishing files to others | ||
| − | ** Google reads it as a Sitemaps file ([http://www.google.com/support/webmasters/bin/answer.py?answer=34655 how to submit]). | + | ** Google reads it as a Sitemaps file ([http://www.google.com/support/webmasters/bin/answer.py?answer=34655 how to submit]) and Internet Archive uses it among others. |
* ... | * ... | ||
Version vom 3. August 2006, 19:27 Uhr
Experimental pages for OSGeodata Mailing List on OSGeo.org.
Goal
Citation from Jo Walsh: Managing metadata well is the key to making a repository of open geographic data really useful and re-usable. Creating metadata can be a dull chore. Part of the problem is over-focus on production, rather than consumption; on standards, rather than on usage. The Geodata Committee at OSGeo has been working on a "simplest useful thing" approach to geographic metadata. This talk discusses ways in which metadata creation can be made easier (by automatic extraction from standards based formats), more fun (through 'conversational' irc and email interfaces rather than filling in forms) and more useful (via GeoRSS syndication and machine-assisted web-based search).
Comparison between WFS and OAI-PMH
WFS:
- Short for 'Web Feature Service'
- Background: A de-facto standard in GIS world owned by OGC
- Query:
- Standard query includes spatial constraints (but no temporal?)
- Needs to be profiled
- Availability and outreach of services, tools and (open source) software:
- Open source software see freegis.org
- ...
OAI-PMH:
- OAI ist short for 'Open Archives Initiative', PMH is short for 'Protocol for Metadata Harvesting'.
- Background: Was initiated by libraries, universities, museums and galleries to 'open access' (OA) free online availability of digital content.
- Query:
- Standard query includes temporal constraints (but no spatial).
- Needs to be extended
- Availability and outreach of services, tools and (open source) software:
- Open source software see OAI-PMH tools
- Gateways available from publishing files to others
- Google reads it as a Sitemaps file (how to submit) and Internet Archive uses it among others.
- ...
Common:
- RESTful
- Both can be profiled to respond an 'output content model' which has yet to be defined.
Weblinks
- OGC's CSW 2.0
- OGC's WFS
- OAI-PMH - Open Archives Initiative Protocol for Metadata Harvesting 2.0
