Search This Blog

Friday, March 12, 2010

OGC Announces Earth Observation Profile for Web-based Catalogue Services

Open Geospatial Consortium Announcement

The Open Geospatial Consortium has announced adoption and availability
of the "OGC Catalogue Services Standard Extension Package for ebRIM
Application Profile: Earth Observation Products", and also the related
"Geography Markup Language (GML) Application Schema for EO Products."
Together, these standards, when implemented, will enable more efficient
data publishing and discovery for a wide range of stakeholders who
provide and use data generated by satellite-borne and aerial radar,
optical and atmospheric sensors.

The OASIS standard ebRIM (Electronic business Registry Information Model)
is the preferred cataloguing metamodel foundation for application
profiles of the OpenGIS Catalogue Service Web (CS-W) Standard. The CS-W
ebRIM EO standard describes a set of interfaces, bindings and encodings
to be implemented in catalog servers so that data providers can publish
descriptive information (metadata) about Earth Observation data. Developers
can also implement this standard as part of Web clients that will enable
data users and their applications to very efficiently search and exploit
these collections of Earth Observation data.

"OGC Catalogue Services Standard 2.0 Extension Package for ebRIM
Application Profile: Earth Observation Products" (OGC 06-131r6) is an
OGC Implementation Standard of subtype Application Profile. This
application profile standard "describes the interfaces, bindings and
encodings required to discover, search and present metadata from
catalogues of Earth Observation products. The profile presents a
minimum specification for catalogue interoperability within the EO
domain, with extensions for specific classes of data. It enables
CSW-ebRIM catalogues to handle a variety of metadata pertaining to
earth observation, like EO Products... EO data product collections
are usually structured to describe data products derived from a single
sensor onboard a satellite or series of satellites. Products from
different classes of sensors usually require specific product metadata.
The following classes of products have been identified so far: radar,
optical, atmospheric."

"OpenGIS Geography Markup Language (GML) Application Schema for Earth
Observation Products" (0GC 06-080r4) is an OGC Implementation Standard
of subtype GML Application Schema. It "describes the encodings required
to describe Earth Observation (EO) products from general to mission
specific characteristics. The approach consists in modelling EO data
product through a GML application schema.ISO definitions are
specified for attributes where available, although not the full ISO
schema is used for the structural definitions, which would lead to a
less efficient overall structure. The general mechanism is to create
a schema with a dedicated namespace for each level of specificity
from a general description which is common to each EO Product to a
restricted description for specific mission EO Product. Each level
of specificity is an extension of the previous one..."

No comments: