static/apidocs/org/apache/sis/referencing/datum/package-summary.html - sis-site - Git at Google

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 <h1 title="Package" class="title">Package&nbsp;org.apache.sis.referencing.datum</h1>
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 </a>
 <div class="block">Relationship of a <code>CoordinateSystem</code> (an abstract mathematical entity) to the earth or other system.
  An explanation for this package is provided in the <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/datum/package-summary.html?is-external=true" class="externalLink">OpenGIS® javadoc</a>.
  The remaining discussion on this page is specific to the SIS implementation.

  <p>The root class in this package is <a href="AbstractDatum.html" title="class in org.apache.sis.referencing.datum"><code>AbstractDatum</code></a>.
  Various subclasses are defined for various kinds of relationship to the Earth or time
  (<a href="DefaultGeodeticDatum.html" title="class in org.apache.sis.referencing.datum">geodetic</a>,
   <a href="DefaultVerticalDatum.html" title="class in org.apache.sis.referencing.datum">vertical</a>,
   <a href="DefaultTemporalDatum.html" title="class in org.apache.sis.referencing.datum">temporal</a>),
  or to platforms (mobile or not)
  (<a href="DefaultEngineeringDatum.html" title="class in org.apache.sis.referencing.datum">engineering</a>,
   <a href="DefaultImageDatum.html" title="class in org.apache.sis.referencing.datum">image</a>).
  Some of those SIS subclasses provide additional methods that are not part of OGC/ISO specifications:</p>
  <ul>
    <li><a href="DefaultEllipsoid.html#getAuthalicRadius()"><code>DefaultEllipsoid.getAuthalicRadius()</code></a></li>
    <li><a href="DefaultEllipsoid.html#getEccentricity()"><code>DefaultEllipsoid.getEccentricity()</code></a></li>
    <li><a href="DefaultPrimeMeridian.html#getGreenwichLongitude(javax.measure.Unit)"><code>DefaultPrimeMeridian.getGreenwichLongitude(Unit)</code></a></li>
    <li><a href="DefaultGeodeticDatum.html#getBursaWolfParameters()"><code>DefaultGeodeticDatum.getBursaWolfParameters()</code></a></li>
    <li><a href="DefaultGeodeticDatum.html#getPositionVectorTransformation(org.opengis.referencing.datum.GeodeticDatum,org.opengis.metadata.extent.Extent)"><code>DefaultGeodeticDatum.getPositionVectorTransformation(GeodeticDatum, Extent)</code></a></li>
  </ul>

  <div class="section">Datum shifts</div>
  Three classes are provided in support of coordinate transformations between different datums:
  <ul>
    <li><a href="BursaWolfParameters.html" title="class in org.apache.sis.referencing.datum"><code>BursaWolfParameters</code></a> performs an approximation
        based on a translation, rotation and scale of geocentric coordinates.</li>
    <li><a href="TimeDependentBWP.html" title="class in org.apache.sis.referencing.datum"><code>TimeDependentBWP</code></a> is like <code>BursaWolfParameters</code>,
        but varies with time for taking in account the motion of plate tectonic.</li>
    <li><a href="DatumShiftGrid.html" title="class in org.apache.sis.referencing.datum"><code>DatumShiftGrid</code></a> is used for more accurate transformations
        than what <code>BursaWolfParameters</code> allows, by interpolating the geographic or geocentric translations
        in a grid (e.g. NADCON or NTv2) instead than apply the same transformation for every points.</li>
  </ul></div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.4</dd>

 <p><font size="-1">Defined in the <code>sis-referencing</code> module</font></p>
 </dl>
 </section>
 <ul class="blockList">
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 <table class="typeSummary">
 <caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
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 <th class="colFirst" scope="col">Class</th>
 <th class="colLast" scope="col">Description</th>
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 <tbody>
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 <th class="colFirst" scope="row"><a href="AbstractDatum.html" title="class in org.apache.sis.referencing.datum">AbstractDatum</a></th>
 <td class="colLast">
 <div class="block">Specifies the relationship of a <a href="../cs/AbstractCS.html" title="class in org.apache.sis.referencing.cs">Coordinate System</a> to the earth.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="BursaWolfParameters.html" title="class in org.apache.sis.referencing.datum">BursaWolfParameters</a></th>
 <td class="colLast">
 <div class="block">Parameters for a geographic transformation between two datum having the same prime meridian.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colFirst" scope="row"><a href="DatumShiftGrid.html" title="class in org.apache.sis.referencing.datum">DatumShiftGrid</a>&lt;C extends <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Quantity.html?is-external=true" title="class or interface in javax.measure" class="externalLink">Quantity</a>&lt;C&gt;,&#8203;T extends <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Quantity.html?is-external=true" title="class or interface in javax.measure" class="externalLink">Quantity</a>&lt;T&gt;&gt;</th>
 <td class="colLast">
 <div class="block">Small but non-constant translations to apply on coordinates for datum shifts or other transformation process.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="DefaultEllipsoid.html" title="class in org.apache.sis.referencing.datum">DefaultEllipsoid</a></th>
 <td class="colLast">
 <div class="block">Geometric figure that can be used to describe the approximate shape of the earth.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colFirst" scope="row"><a href="DefaultEngineeringDatum.html" title="class in org.apache.sis.referencing.datum">DefaultEngineeringDatum</a></th>
 <td class="colLast">
 <div class="block">Defines the origin of an engineering coordinate reference system.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="DefaultGeodeticDatum.html" title="class in org.apache.sis.referencing.datum">DefaultGeodeticDatum</a></th>
 <td class="colLast">
 <div class="block">Defines the location and orientation of an ellipsoid that approximates the shape of the earth.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colFirst" scope="row"><a href="DefaultImageDatum.html" title="class in org.apache.sis.referencing.datum">DefaultImageDatum</a></th>
 <td class="colLast">
 <div class="block">Defines the origin of an image coordinate reference system.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="DefaultParametricDatum.html" title="class in org.apache.sis.referencing.datum">DefaultParametricDatum</a></th>
 <td class="colLast">
 <div class="block">Defines the origin of a parametric coordinate reference system.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colFirst" scope="row"><a href="DefaultPrimeMeridian.html" title="class in org.apache.sis.referencing.datum">DefaultPrimeMeridian</a></th>
 <td class="colLast">
 <div class="block">Defines the origin from which longitude values are determined.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="DefaultTemporalDatum.html" title="class in org.apache.sis.referencing.datum">DefaultTemporalDatum</a></th>
 <td class="colLast">
 <div class="block">Defines the origin of a temporal coordinate reference system.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colFirst" scope="row"><a href="DefaultVerticalDatum.html" title="class in org.apache.sis.referencing.datum">DefaultVerticalDatum</a></th>
 <td class="colLast">
 <div class="block">Identifies a particular reference level surface used as a zero-height surface.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colFirst" scope="row"><a href="TimeDependentBWP.html" title="class in org.apache.sis.referencing.datum">TimeDependentBWP</a></th>
 <td class="colLast">
 <div class="block">Parameters for a time-dependent geographic transformation between two datum.</div>
 </td>
 </tr>
 </tbody>
 </table>
 </li>
 </ul>
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	<h1 title="Package" class="title">Package org.apache.sis.referencing.datum</h1>
	</div>
	<div class="contentContainer">
	<section role="region"><a id="package.description">
	<!-- -->
	</a>
	<div class="block">Relationship of a <code>CoordinateSystem</code> (an abstract mathematical entity) to the earth or other system.
	An explanation for this package is provided in the <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/datum/package-summary.html?is-external=true" class="externalLink">OpenGIS® javadoc</a>.
	The remaining discussion on this page is specific to the SIS implementation.

	<p>The root class in this package is <a href="AbstractDatum.html" title="class in org.apache.sis.referencing.datum"><code>AbstractDatum</code></a>.
	Various subclasses are defined for various kinds of relationship to the Earth or time
	(<a href="DefaultGeodeticDatum.html" title="class in org.apache.sis.referencing.datum">geodetic</a>,
	<a href="DefaultVerticalDatum.html" title="class in org.apache.sis.referencing.datum">vertical</a>,
	<a href="DefaultTemporalDatum.html" title="class in org.apache.sis.referencing.datum">temporal</a>),
	or to platforms (mobile or not)
	(<a href="DefaultEngineeringDatum.html" title="class in org.apache.sis.referencing.datum">engineering</a>,
	<a href="DefaultImageDatum.html" title="class in org.apache.sis.referencing.datum">image</a>).
	Some of those SIS subclasses provide additional methods that are not part of OGC/ISO specifications:</p>
	<ul>
	<li><a href="DefaultEllipsoid.html#getAuthalicRadius()"><code>DefaultEllipsoid.getAuthalicRadius()</code></a></li>
	<li><a href="DefaultEllipsoid.html#getEccentricity()"><code>DefaultEllipsoid.getEccentricity()</code></a></li>
	<li><a href="DefaultPrimeMeridian.html#getGreenwichLongitude(javax.measure.Unit)"><code>DefaultPrimeMeridian.getGreenwichLongitude(Unit)</code></a></li>
	<li><a href="DefaultGeodeticDatum.html#getBursaWolfParameters()"><code>DefaultGeodeticDatum.getBursaWolfParameters()</code></a></li>
	<li><a href="DefaultGeodeticDatum.html#getPositionVectorTransformation(org.opengis.referencing.datum.GeodeticDatum,org.opengis.metadata.extent.Extent)"><code>DefaultGeodeticDatum.getPositionVectorTransformation(GeodeticDatum, Extent)</code></a></li>
	</ul>

	<div class="section">Datum shifts</div>
	Three classes are provided in support of coordinate transformations between different datums:
	<ul>
	<li><a href="BursaWolfParameters.html" title="class in org.apache.sis.referencing.datum"><code>BursaWolfParameters</code></a> performs an approximation
	based on a translation, rotation and scale of geocentric coordinates.</li>
	<li><a href="TimeDependentBWP.html" title="class in org.apache.sis.referencing.datum"><code>TimeDependentBWP</code></a> is like <code>BursaWolfParameters</code>,
	but varies with time for taking in account the motion of plate tectonic.</li>
	<li><a href="DatumShiftGrid.html" title="class in org.apache.sis.referencing.datum"><code>DatumShiftGrid</code></a> is used for more accurate transformations
	than what <code>BursaWolfParameters</code> allows, by interpolating the geographic or geocentric translations
	in a grid (e.g. NADCON or NTv2) instead than apply the same transformation for every points.</li>
	</ul></div>
	<dl>
	<dt><span class="simpleTagLabel">Since:</span></dt>
	<dd>0.4</dd>

	<p><font size="-1">Defined in the <code>sis-referencing</code> module</font></p>
	</dl>
	</section>
	<ul class="blockList">
	<li class="blockList">
	<table class="typeSummary">
	<caption><span>Class Summary</span><span class="tabEnd"> </span></caption>
	<tr>
	<th class="colFirst" scope="col">Class</th>
	<th class="colLast" scope="col">Description</th>
	</tr>
	<tbody>
	<tr class="altColor">
	<th class="colFirst" scope="row"><a href="AbstractDatum.html" title="class in org.apache.sis.referencing.datum">AbstractDatum</a></th>
	<td class="colLast">
	<div class="block">Specifies the relationship of a <a href="../cs/AbstractCS.html" title="class in org.apache.sis.referencing.cs">Coordinate System</a> to the earth.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<th class="colFirst" scope="row"><a href="BursaWolfParameters.html" title="class in org.apache.sis.referencing.datum">BursaWolfParameters</a></th>
	<td class="colLast">
	<div class="block">Parameters for a geographic transformation between two datum having the same prime meridian.</div>
	</td>
	</tr>
	<tr class="altColor">
	<th class="colFirst" scope="row"><a href="DatumShiftGrid.html" title="class in org.apache.sis.referencing.datum">DatumShiftGrid</a><C extends <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Quantity.html?is-external=true" title="class or interface in javax.measure" class="externalLink">Quantity</a><C>,T extends <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Quantity.html?is-external=true" title="class or interface in javax.measure" class="externalLink">Quantity</a><T>></th>
	<td class="colLast">
	<div class="block">Small but non-constant translations to apply on coordinates for datum shifts or other transformation process.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<th class="colFirst" scope="row"><a href="DefaultEllipsoid.html" title="class in org.apache.sis.referencing.datum">DefaultEllipsoid</a></th>
	<td class="colLast">
	<div class="block">Geometric figure that can be used to describe the approximate shape of the earth.</div>
	</td>
	</tr>
	<tr class="altColor">
	<th class="colFirst" scope="row"><a href="DefaultEngineeringDatum.html" title="class in org.apache.sis.referencing.datum">DefaultEngineeringDatum</a></th>
	<td class="colLast">
	<div class="block">Defines the origin of an engineering coordinate reference system.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<th class="colFirst" scope="row"><a href="DefaultGeodeticDatum.html" title="class in org.apache.sis.referencing.datum">DefaultGeodeticDatum</a></th>
	<td class="colLast">
	<div class="block">Defines the location and orientation of an ellipsoid that approximates the shape of the earth.</div>
	</td>
	</tr>
	<tr class="altColor">
	<th class="colFirst" scope="row"><a href="DefaultImageDatum.html" title="class in org.apache.sis.referencing.datum">DefaultImageDatum</a></th>
	<td class="colLast">
	<div class="block">Defines the origin of an image coordinate reference system.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<th class="colFirst" scope="row"><a href="DefaultParametricDatum.html" title="class in org.apache.sis.referencing.datum">DefaultParametricDatum</a></th>
	<td class="colLast">
	<div class="block">Defines the origin of a parametric coordinate reference system.</div>
	</td>
	</tr>
	<tr class="altColor">
	<th class="colFirst" scope="row"><a href="DefaultPrimeMeridian.html" title="class in org.apache.sis.referencing.datum">DefaultPrimeMeridian</a></th>
	<td class="colLast">
	<div class="block">Defines the origin from which longitude values are determined.</div>
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