|Products » Web Enterprise Suite » WES Catalog|
| || |
Interoperable Web services catalog management for discovery, publishing and access. Supports the OGC Catalog Services Specification 2.0.2
WES Catalog is an OGC ebXML-based catalog that provides discovery, access, harvesting and maintenance of location-based data and services metadata. Discovery of data services is provided through the WES Catalog OGC Catalogue Service for the Web (CSW) interface enabling a client to locate data and service metadata quickly and effectively.
Location-based data and services metadata is stored in the WES CSW catalog. A CSW catalog is a database that contains a list of data and services, the metadata that describes the services and the parameters and attributes that are required for invoking, chaining or directly accessing the data or service.
The application also has a metadata harvest process that will automatically ingest service metadata from Web-services servers and clients. WES Catalog is also Open Geospatial Consortium (OGC)-compliant.
Also included with a WES Catalog distribution is GeoNetwork. GeoNetwork is used as a metadata entry tool when augmenting/editing metadata being published into the WES Catalog database.
WES Catalog contains a semantic metadata crosswalk for each of the metadata standards to be maintained within the portal infrastructure. The following are representative samples of metadata standards supported:
The WES Catalog architecture has been specifically designed to be deployed in a multi-tier arrangement of clients and servers. Discovery of services is provided through WES Catalog service interfaces, which enable clients to locate service metadata quickly and effectively.
The multi-tiered architecture is illustrated below
Client applications are able to query the Application Services metadata database to determine the services that are available for search and discovery, data selection and extraction and analysis. Application Services will be identified according to the computer platform (client/server).
The WES Catalog component has the capability to store metadata about information, services and content. Metadata mappings are performed so that a crosswalk can be performed between the systems’ internal storage of metadata and the format the requesting client would like to see.
This metadata mapping technique enables users to publish data and metadata using an independent metadata publication form. Metadata storage and representation is an important component for service registries for the following reasons:
WES Catalog contains the following integrated components:
A WES Catalog component, WES Explorer provides catalog discovery functionality through the WES portal interface.
WES Explorer is a client catalog interface that provides Catalog discovery functionality.
Through the WES Portal interface, users are presented with three different catalog search options, which are:
WES Keyword Search is presented to users usually directly at the home page. Users can enter a "search term" in order to conduct a high-level text search of the catalog.
WES Simple Search is provided as a a"quick-start" link off the main home page and brings users directly to a "Search Catalog" form page. This page allows users to refine their search by selecting one or more dynamic filter options available as selection check boxes.
WES Advanced Search provides all the functionality of the Keyword Search and the Simple Search but provides several new features such as definable geogrpahic extent and temporal parameters.
WES Advanced Search provides a map-based interface that can be used to draw an Area of Interest (AOI), which will proivde input parameters for the catalog search based on a geographic area as defined by the AOI. Geographic coordinates may also be entered, and time periods for data discovery can also be specified.
A WES Catalog component, WES Publisher / Harvester provides users the ability to publish geospatial information.
The WES Publishing client is available as a JSP application that provides the ability for Data Custodians to publish and register geospatial applications, services, styles, data and data products into the catalog.
The WES Publisher supports the following content:
Compusult's WES Gazetteer provides standards-based world coverage for place name lookup.
Web Enterprise Suite (WES) Gazetteer is an Open Geospatial Consortium (OGC) - enabled gazetteer service that provides world coverage for place name look-up services.
A gazetteer is list of geographic names, together with their geographic locations and other descriptive (metadata) information.
Diagram of WES Gazetteer:
WES Gazetteer place names and associated metadata is populated in a database and is composed of content from the following sources:
This service is available on both UNIX and Windows® platforms, contains easy installation procedures and standards-based interfaces for searching, discovery and access in the HTTP computing environment.
WES Gazetteer is a component of Compusult’s Web Enterprise Suite; a set of Internet-based applications and toolkits that support Web mapping, information cataloging, discovery, retrieval and delivery services.
WES Gazetteer is also a contributor to the Open Geospatial Consortium Catalogue Services Interoperability initiative.