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OGC - Open Geospatial Consortium
Organização sem fins-lucrativos formada por +/- 370 instituições voluntárias de vários países que, desde 1994, define padrões de:
- Conteúdo e de serviços geoespaciais
- Processamento de dados SIG
- Compartilhamento de dados
Padrões
Most of the OGC standards are based on a generalized architecture captured in a set of documents collectively called the Abstract Specification
, which describes a basic data model for geographic features to be represented. Atop the Abstract Specification is a growing number of specifications, or ''standards'', that have been (or are being) developed to serve specific needs for interoperable location and geospatial technology, including GIS.
thumb|347px|Relationship between clients/servers and some OGC protocols The are currently 28 standards in the OGC standards baseline, including: * OGC Reference Model - a complete set of reference models. * WMS - Web Map Service: Provides map images. * WFS - Web Feature Service: For retrieving or altering feature descriptions. * WCS - Web Coverage Service: Provide coverage objects from a specified region. * WPS - Web Processing Service: Remote processing service. * CSW - Web Catalog Service: Access to catalog information. * SFS - Simple Features - SQL * GML - Geography Markup Language: XML format for geographical information. * KML - Keyhole Markup Language: XML-based language schema for expressing geographic annotation and visualization on existing or future Web-based, two-dimensional maps and three-dimensional Earth browsers. * OWS - OGC Web Service Common
These were originally designed around the HTTP web services paradigm for message-based interactions in web-based systems. However, in the last year the members have been working on defining a common approach for SOAP protocol and WSDL bindings. There has also been considerable work and progress in defining Representational State Transfer web services..
WFS - Web Feature Specification
- É um padrão de interface para transporte de dados geográficos na Web.
- Usa chamadas independentes de plataforma.