9-Lecture15
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NSDI in the Web 2.0 Era<br />
Lecture 15
From Data Duplication to Web Services<br />
– NSDI is defined as “the technology, policies,<br />
standards, and human resource necessary to<br />
acquire, process, store, share, distribute, and<br />
improve utilization of geospatial data”
From Data Duplication to Web Services<br />
– Data Duplication Based NSDI 1.0
From Data Duplication to Web Services<br />
– Disadvantages of Data Duplication<br />
• Delays<br />
• High cost of recipients<br />
• Copyright concerns
From Data Duplication to Web Services<br />
– Web Services-based NSDI 2.0 (WOA – Web Oriented<br />
Architecture)
From Data Duplication to Web Services<br />
– UGC – User Generated Content<br />
– VGI – Volunteered Geographic Information
From Data Duplication to Web Services<br />
– WOA represents a specialization of SOA that uses<br />
RESTful Web services and lightweight mashups<br />
• Advantages<br />
– Cost-effectiveness for client organizations<br />
– Greater data accuracy<br />
– Greater flexibility and agility<br />
– Easier interoperability<br />
– Better protected intellectual property
From Data Duplication to Web Services<br />
– The technical philosophy of NSDI 2.0 is that<br />
geospatial data and environmental information<br />
should be maintained locally, closest to source, and<br />
then shared with the nation through online services
Sharing Web Services<br />
– The technical philosophy of NSDI 2.0 is that<br />
geospatial data and environmental information<br />
should be maintained locally, closest to source, and<br />
then shared with the nation through online services
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