OGC Glossary

Glossary of Terms - U

Source: http://www.softwareag.com/xml/about/glossary.htm
"Universal Description, Discovery, and Integration, a standard for a platform-independent, open framework for describing services on the Internet, suggested by, among others, IBM, Ariba and Microsoft, September 6, 2000. UDDI is intended mainly for B2B enhancement and is based on the W3C`s XML standard and, especially on SOAP". UDDI provides a mechanism for clients to dynamically find other Web services. A UDDI registry is similar to a CORBA trader, or it can be thought of as a DNS service for business applications. A UDDI registry has two kinds of clients: businesses that want to publish a service (and its usage interfaces), and clients who want to obtain services of a certain kind and bind programmatically to them.

use case scenario
Source: GETIS glossary
A possible sequence of real world events used as a test case for specifying or testing information systems designed to help manage such events.
user domain
Source: GETIS glossary
"User group with common interests in activities in a specific discipline, parts of a discipline or a type of GIS application, e.g. local government, fire brigades, etc."
user portability
The ability of a user to move from one system to another without having to relearn everything necessary to use such as system.
UTM Coordinate System (Universal Tranverse Mercator)
A planar locational reference system which provides positional descriptions accurate to 1 meter in 2,500 across the entire earth`s surface except the poles. Based on the Universal Transverse Mercator map projection. At the poles, the Universal Polar Stereographic projection is used. The UTM system divides the earth`s surface into a grid in which each cell, excluding overlap with its neighbors, is 6 degrees east to west, and 8 degrees north to south (with the exception of the row from 72-84 degrees north latitude). For any position in the UTM grid, X-Y coordinates can be determined in eastings and northings. Eastings are in meters with respect to a central meridian drawn through the center of each grid zone (and given an arbitrary easting of 500,000 meters). In the northern hemisphere, northings are read in meters from the equator (0 meters). In the southern hemisphere, the equator is given the false northing of 10 million meters.

Glossary of Terms - V

The process of testing an application or system to ensure that it conforms to a specification.
A representation of the spatial extent of geographic features using geometric elements (such as point, curve, and surface) in a coordinate space.
vector displays and databases
Databases that build all geographic features from point, that is, from discrete X-Y locations. Lines are constructed from strings of points, and polygons (regions) are built from lines which close.
vector methods
In geoprocessing, methods of representing geographic features from points, lines, and polygons, as opposed to raster techniques which record geographic features within a matrix of grid cells. The choice between vector and raster GIS has much to do with the application being considered since both methods have strengths and weaknesses. Many current GIS permit transformation between vector and raster input and output.
SQL `Select`, Statement, used to provide temporary information about a given table(s) of a Database Management System without actually creating a subset or new table.
Form of abstraction achieved using a selected set of architectural concepts and structuring rules, in order to focus on particular concerns within a system. ISO-10746-2 In an RM-ODP based description of a multi-tier, multi-network architecture, the Enterprise, Information, and Computation viewpoints describe a system in terms of its purposes, its content, and its functions.
virtual reality (VR)
Refers generally to interactive multimedia environments that present users with a sensory experience similar in some ways to our experience of the real world.
Vector Product Format. A published vector format used by the US Department of Defense.

Glossary of Terms - W

World Wide Web Consortium. The organization that manages standards for the Worldwide Web.
Web Coverage Service (WCS)
Supports the networked interchange of geospatial data as "coverages" containing values or properties of geographic locations. Unlike the Web Map Service, which returns static maps (server-rendered as pictures), the Web Coverage Service provides access to intact (unrendered) geospatial information.
Web Feature Service (WFS)
OpenGIS Specification that supports INSERT, UPDATE, DELETE, QUERY and DISCOVERY of geographic features. WFS delivers GML representations of simple geospatial features in response to queries from HTTP clients. Clients access geographic feature data through WFS by submitting a request for just those features that are needed for an application.
Web mapping
Dynamic query, access, processing, combination and portrayal of different types of spatial information over the Web.
Web Mapping Service (WMS)
OpenGIS Specification that standardizes the way in which Web clients request maps. Clients request maps from a WMS instance in terms of named layers and provide parameters such as the size of the returned map as well as the spatial reference system to be used in drawing the map.
Web Mapping Testbeds (WMT) Phases 1 and 2
The groundbreaking Web Mapping Testbed Phase 1 (WMT 1), which ran from June, 1999 to October, 1999, yielded candidate interface specifications for Web mapping that were subsequently approved by OGC`s Technical Committee and Planning Committee. The Web Mapping Testbed Phase 2 (WMT 2), which ran from June, 2000 to March, 2001 expanded on this foundation with extensions to those specifications and a set of new draft specifications
Web Registry Service
The Web Registry Service is a software component that supports the run-time discovery and evaluation of resources such as services, datasets, and application schemes.
Web Service Flow Language (WSFL)
Available at: www.oasis-open.org/cover/wsfl.html
Web Services
"Web services are self-contained, self-describing, modular applications that can be published, located, and invoked across the Web. Web services perform functions that can be anything from simple requests to complicated business processes. Once a Web service is deployed, other applications (and other Web services) can discover and invoke the deployed service."
Web Services Definition Language (WSDL)
Available at: http://www.w3.org/TR/wsdl
Web Services Description Language (WSDL)
The language for describing and encoding services. The Web Services Description Language (WSDL) is a draft specification from W3C to describe networked services in terms of what they can do, where they reside on the network and how to invoke them.
Well-Known Binary Representation for Geometry (WKBGeometry)
Data format that provides a portable representation of a Geometry value as a contiguous stream of bytes. Obtained by serializing a geometric object as a sequence of numeric types drawn from the set {Unsigned Integer, Double} and then serializing each numeric type as a sequence of bytes using one of two well defined, standard, binary representations for numeric types (NDR, XDR).
Well-Known Text Representation of Spatial Reference Systems
Format that provides a standard textual representation for spatial reference system information. The definitions of the well-known text representations are modeled after the POSC/EPSG coordinate data.
See Web Feature Service.
See Web Map Service
WMS Context
XML document that unambiguously describes the state or "context" of a WMS client states that accounts for a specific grouping of one or more maps from one or more map servers can be described in a portable, platform-independent format for storage in a repository of for transmission between WMS clients
Working Group (WG)
In OGC, a group of individuals composed of members of the Technical Committee and invited guests, working to solve some particular problem or problems in a particular arena of interoperable geoprocessing. A particular use of the Working Group structure is to generate Requests for Information or Requests for Proposal, and to evaluate responses.
See Web Registry Service.
Web Services Description Language
Source: PreANVIL Glossary http://www.anvil.eu.com/find/Glossary-english.htm
"World Wide Web: a collection of protocols, based on IP, and infrastructure that enable efficient, user-friendly publishing, discovery and access to digital information."

Glossary of Terms - X

XML for Imagery and Map Annotations, OGC Discussion Paper 01-018: 29.XML Linking Language (XLink), Version 1.0, DeRose, S., Maler, E., Orchard, D., available at: http://www.w3.org/TR/xlink/
Source: PreANVIL Glossary http://www.anvil.eu.com/find/Glossary-english.htm
XML (eXtensible Markup Language) is the predominant form for interoperable, self-describing data/content, in combination with XML schema definition language. See http://www.w3.org/XML/. XML has its roots in SGML, the Standard Generalized Markup Language (an ISO standard). The development of XML came about because of perceived limitations in HTML when used as a tool for publishing complex documents on the Web. http://www.w3.org.
XML for Imagery and Map Annotations (XIMA)
The means to encode annotations on imagery, maps, and other geospatial data.
XML for Location Services (XLS)
The encoding method for OpenLS-based Abstract Data Types.
"(eXtensible Stylesheet Language Transformation) A language used to convert an XML document into another XML document or into HTML, PDF or some other format."


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