GeoPlatform.gov aggregates, indexes, links, and organizes web resources of all kinds into a managed collection of curated objects called the GeoPlatform Portfolio. The resources of interest are described here.
These are the core business objects of the GeoPlatform Portfolio, representing geospatial resources that are curated, linked, discovered, and ultimately accessed online by individuals and software applications.
Portfolio Assets may be linked to Persons resources with roles such as author, contributor, publisher, custodian, or point-of-contact to name a few. Contacts are a class of resource in the GeoPlatform Portfolio with “vcard” information (e.g., full name, organization name, email, phone, address) used by humans to contact and communicate with fellow humans.
Portfolio Assets are also linked to Concepts — terms or units of thought about specific ideas, meanings, and categories of objects and events — to help express the purpose and “fit-for-use” (i.e., the meaning, significance, and function) of a resource as defined by producers and determined by consumers. Concepts are most useful when they are defined by authoritative or “controlled” vocabularies, generically called Concept Schemes.
To publish data in the Web, we first have to identify the items of interest — those concepts, topics, events, communities, organizations, people, phenomena, features, datasets, applications, and services that are relevant to us. All items of interest are called resources. These are the things whose properties and relationships we want to describe and manage in the Web of Data.
GeoPlatform.gov aggregates, indexes, and links resources of the National Spatial Data Infrastructure (NSDI) to facilitate public and cross-government sharing, discovery, and access, of managed collections of authoritative and other relevant geospatial data. These are the things we are interested in curating, finding, and exploiting. The GeoPlatform Portfolio is a collection of resources of various types, roles, and interrelationships that have been curated for rapid access and use online.
The GeoPlatform Portfolio is managed as Linked Data on the Web. Linked Data enables people and software to share structured data and other related resources on the Web as easily as they can share documents today. The term Linked Data was coined by Tim Berners-Lee in his Linked Data Web Architecture note. The term refers to a style of publishing and interlinking structured data on the Web. The basic assumption behind Linked Data is this: the value and usefulness of data increases the more it is interlinked with other data. In summary, Linked Data is simply about using the Web to create typed links between data from different sources so that relevant data can be more easily found, accessed, and exploited. This is what the GeoPlatform does.
Follow the references below for more information about the Semantic Web, Linked Open Data, and Spatial Data in the Web.