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<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
</head>
<body>
<header style="position:fixed;width:100%" id="topNav">
<nav>
<a href="https://opengeospatial.github.io/ontology-crs/core/">Core Ontology</a>
<a href="https://opengeospatial.github.io/ontology-crs/cs/">Coordinate System Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/co/">Coordinate Operations Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/datum/">Datum Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/application/">SRS Application Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/planet/">Planet Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/projection/">Projections Vocabulary</a>
<a href="https://opengeospatial.github.io/ontology-crs/alignments/">Alignments</a>
</nav>
<h3>CRS Ontology documentation</h3>
</header>
<div class="content">
<br/><br/>
<h3 id="geosparql10">CRS Ontology</h3>
In this repository we specify vocabularies to describe coordinate and spatial reference systems and their components.<br>
The vocabularies will be more fleshed out as time goes by and are until a release to be considered work in progress.<br>
Current anticipated vocabularies are:
<ul>
<li>Alignments: Alignments of the vocabulary to other vocabularies representing CRS</li>
<li>Application vocabulary: Capturing typical applications of defined SRS</li>
<li>Core Ontology: Representing core parts for the specification of a CRS</li>
<li>Coordinate System Vocabulary: Representing coordinate system types and their parameters</li>
<li>Coordinate Operation Vocabulary: Representing operations on coordinates</li>
<li>Datum Vocabulary: Representing datum types and their parameters</li>
<li>Projection Vocabulary: Representing common projections and their parameters</li>
<li>Planet Vocabulary: Representing planets and their approximations e.g. as Ellipsoids</li>
</ul>
</div>
<h3>Related Work</h3>
<ul>
<li><a href="https://data.ign.fr/def/ignf/20190213.en.htm">IGN CRS Ontology</a></li>
<li><a href="https://www.iso.org/standard/74039.html">ISO 19111:2019 Spatial Referencing By Coordinates</a></li>
<li><a href="https://github.com/situx/proj4rdf">Proj4RDF Projekt</a></li>
</ul>
<footer class="site-footer">
<div class="wrapper">
<h5 class="footer-heading">CRS Ontology Working Group Github Page</h5>
<div class="footer-col-wrapper">
<div class="footer-col footer-col-1">
<ul class="contact-list" style="list-style-type:none;">
<li>CRS ontology working Group Github Page</li>
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<!--<ul class="social-media-list" style="list-style-type:none;">
<li>
<a href="https://opengeospatial.github.io/ogc-geosparql/blog/">Meeting Notes</a>
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<p>Rescources and development versions of the CRS ontology group</p>
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