OSGeodata: Unterschied zwischen den Versionen
Aus Geoinformation HSR
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== Goal == | == 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. | + | 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...". |
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== Comparison between WFS and OAI-PMH == | == Comparison between WFS and OAI-PMH == | ||
Version vom 3. August 2006, 20:38 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...".
Comparison between WFS and OAI-PMH
WFS:
- Short for 'Web Feature Service'
- Background: A de-facto standard in GIS world owned by OGC
- Requests: GetCapabilities, DescribeFeatureType, GetFeature, Transaction, LockFeature
- 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.
- Requests: Identify, ListMetadataFormats, ListSets, ListIdentifiers, ListRecords, GetRecord.
- 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