static/apidocs/org/apache/sis/measure/Latitude.html - sis-site - Git at Google

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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.measure</a></div>
 <h2 title="Class Latitude" class="title">Class Latitude</h2>
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 <pre>public final class <span class="typeNameLabel">Latitude</span>
 extends <a href="Angle.html" title="class in org.apache.sis.measure">Angle</a></pre>
 <div class="block">A latitude angle in decimal degrees.
  Positive latitudes are North, while negative latitudes are South.
  The latitude symbol is the Greek lower-case letter phi (φ).

  <p>Because the Earth is not a perfect sphere, there is small differences in the latitude values of a point
  depending on how the latitude is defined:</p>

  <ul>
    <li><cite>Geodetic latitude</cite> is the angle between the equatorial plane and a line perpendicular
        to the <a href="../referencing/datum/DefaultEllipsoid.html" title="class in org.apache.sis.referencing.datum">ellipsoid</a> surface.</li>
    <li><cite>Geocentric latitude</cite> is the angle between the equatorial plane and a line going from
        the Earth center. It differs from geodetic latitude by less than 11 angular minutes.</li>
    <li><cite>Astronomical latitude</cite> is the angle between the equatorial plane and a line given
        by the direction of a plumb line (the "true vertical").</li>
    <li>Above list is not exhaustive. There is also <cite>geomagnetic latitude</cite>, <i>etc.</i></li>
  </ul>

  The kind of latitude is unspecified by this <code>Latitude</code> class, and rather depends on the context:
  the latitude is <cite>geodetic</cite> if the coordinate reference system is
  <a href="../referencing/crs/DefaultGeographicCRS.html" title="class in org.apache.sis.referencing.crs">geographic</a>,
  or <cite>geocentric</cite> if the coordinate reference system is
  <a href="../referencing/crs/DefaultGeocentricCRS.html" title="class in org.apache.sis.referencing.crs">geocentric</a>.
  If the context is unknown, then geodetic latitude can usually be assumed.

  <div class="section">Immutability and thread safety</div>
  This final class is immutable and thus inherently thread-safe.</div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.3</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="Longitude.html" title="class in org.apache.sis.measure"><code>Longitude</code></a>,
 <a href="AngleFormat.html" title="class in org.apache.sis.measure"><code>AngleFormat</code></a>,
 <a href="../geometry/CoordinateFormat.html" title="class in org.apache.sis.geometry"><code>CoordinateFormat</code></a>,
 <a href="../../../../serialized-form.html#org.apache.sis.measure.Latitude">Serialized Form</a></dd>

 <p><font size="-1">Defined in the <code>sis-utility</code> module</font></p>
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 <td class="colFirst"><code>static double</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#MAX_VALUE">MAX_VALUE</a></span></code></th>
 <td class="colLast">
 <div class="block">Maximum usual value for latitude (+90.0°).</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>static double</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#MIN_VALUE">MIN_VALUE</a></span></code></th>
 <td class="colLast">
 <div class="block">Minimum usual value for latitude (-90.0°).</div>
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 <th class="colFirst" scope="col">Constructor</th>
 <th class="colLast" scope="col">Description</th>
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 <tr class="altColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(double)">Latitude</a></span>&#8203;(double&nbsp;φ)</code></th>
 <td class="colLast">
 <div class="block">Construct a new latitude with the specified angular value.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.String)">Latitude</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;string)</code></th>
 <td class="colLast">
 <div class="block">Constructs a newly allocated <code>Latitude</code> object that contain the angular value
  represented by the string.</div>
 </td>
 </tr>
 <tr class="altColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.opengis.geometry.DirectPosition)">Latitude</a></span>&#8203;(<a href="http://www.geoapi.org/3.0/javadoc/org/opengis/geometry/DirectPosition.html?is-external=true" title="class or interface in org.opengis.geometry" class="externalLink">DirectPosition</a>&nbsp;position)</code></th>
 <td class="colLast">
 <div class="block">Constructs a newly allocated object containing the latitude value of the given position.</div>
 </td>
 </tr>
 </table>
 </li>
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 <td class="colFirst"><code>static double</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clamp(double)">clamp</a></span>&#8203;(double&nbsp;φ)</code></th>
 <td class="colLast">
 <div class="block">Returns the given latitude value clamped to the [<a href="#MIN_VALUE">-90</a> … <a href="#MAX_VALUE">90</a>]° range.</div>
 </td>
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 <h3>Methods inherited from class&nbsp;<a href="Angle.html" title="class in org.apache.sis.measure">Angle</a></h3>
 <code><a href="Angle.html#compareTo(org.apache.sis.measure.Angle)">compareTo</a>, <a href="Angle.html#degrees()">degrees</a>, <a href="Angle.html#equals(java.lang.Object)">equals</a>, <a href="Angle.html#formatTo(java.util.Formatter,int,int,int)">formatTo</a>, <a href="Angle.html#hashCode()">hashCode</a>, <a href="Angle.html#radians()">radians</a>, <a href="Angle.html#toString()">toString</a></code></li>
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 <h4>MIN_VALUE</h4>
 <pre>public static final&nbsp;double MIN_VALUE</pre>
 <div class="block">Minimum usual value for latitude (-90.0°).</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../referencing/cs/DefaultCoordinateSystemAxis.html#getMinimumValue()"><code>DefaultCoordinateSystemAxis.getMinimumValue()</code></a>,
 <a href="../../../../constant-values.html#org.apache.sis.measure.Latitude.MIN_VALUE">Constant Field Values</a></dd>
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 <pre>public static final&nbsp;double MAX_VALUE</pre>
 <div class="block">Maximum usual value for latitude (+90.0°).</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../referencing/cs/DefaultCoordinateSystemAxis.html#getMaximumValue()"><code>DefaultCoordinateSystemAxis.getMaximumValue()</code></a>,
 <a href="../../../../constant-values.html#org.apache.sis.measure.Latitude.MAX_VALUE">Constant Field Values</a></dd>
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 <h4>Latitude</h4>
 <pre>public&nbsp;Latitude&#8203;(double&nbsp;φ)</pre>
 <div class="block">Construct a new latitude with the specified angular value.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>\u03c6</code> - latitude value in decimal degrees.</dd>
 </dl>
 </li>
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 <h4>Latitude</h4>
 <pre>public&nbsp;Latitude&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;string)
          throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang" class="externalLink">NumberFormatException</a></pre>
 <div class="block">Constructs a newly allocated <code>Latitude</code> object that contain the angular value
  represented by the string. The string should represent an angle in either fractional
  degrees (e.g. 45.5°) or degrees with minutes and seconds (e.g. 45°30').
  The hemisphere (N or S) is optional (default to North).

  <p>This is a convenience constructor mostly for testing purpose, since it uses a fixed
  locale. Developers should consider using <a href="AngleFormat.html" title="class in org.apache.sis.measure"><code>AngleFormat</code></a> for end-user applications
  instead than this constructor.</p></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>string</code> - a string to be converted to a <code>Latitude</code>.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang" class="externalLink">NumberFormatException</a></code> - if the string does not contain a parsable angle,
          or represents a longitude angle.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="AngleFormat.html#parse(java.lang.String)"><code>AngleFormat.parse(String)</code></a></dd>
 </dl>
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 </ul>
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 <h4>Latitude</h4>
 <pre>public&nbsp;Latitude&#8203;(<a href="http://www.geoapi.org/3.0/javadoc/org/opengis/geometry/DirectPosition.html?is-external=true" title="class or interface in org.opengis.geometry" class="externalLink">DirectPosition</a>&nbsp;position)
          throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink">IllegalArgumentException</a></pre>
 <div class="block">Constructs a newly allocated object containing the latitude value of the given position.
  For this method, the latitude value is defined as the angular value associated to the first axis
  oriented toward <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/cs/AxisDirection.html?is-external=true#NORTH" title="class or interface in org.opengis.referencing.cs" class="externalLink">North</a> or <a href="http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/cs/AxisDirection.html?is-external=true#SOUTH" title="class or interface in org.opengis.referencing.cs" class="externalLink">South</a>.
  Note that this is not necessarily the <cite>geodetic latitudes</cite> used in
  <a href="../referencing/crs/DefaultGeographicCRS.html" title="class in org.apache.sis.referencing.crs">geographic CRS</a>;
  it may also be <cite>geocentric latitudes</cite>.

  <p>If the axis direction is South, then the sign of the coordinate value is inverted.
  If the coordinate value uses another angular units than <a href="Units.html#DEGREE">degrees</a>,
  then a unit conversion is applied.</p></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>position</code> - the coordinate from which to extract the latitude value in degrees.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink">IllegalArgumentException</a></code> - if the given coordinate it not associated to a CRS,
          or if no axis oriented toward North or South is found, or if that axis does
          not use <a href="Units.html#isAngular(javax.measure.Unit)">angular units</a>.</dd>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.8</dd>
 </dl>
 </li>
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 <h4>clamp</h4>
 <pre class="methodSignature">public static&nbsp;double&nbsp;clamp&#8203;(double&nbsp;φ)</pre>
 <div class="block">Returns the given latitude value clamped to the [<a href="#MIN_VALUE">-90</a> … <a href="#MAX_VALUE">90</a>]° range.
  If the given value is outside the latitude range, then this method replaces it by ±90° with the same sign than the
  given φ value.

  <p>Special cases:</p>
  <ul>
    <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true#NaN" title="class or interface in java.lang" class="externalLink">NaN</a> values are returned unchanged</li>
    <li>±∞ are mapped to ±90° (with the same sign)</li>
    <li>±0 are returned unchanged (i.e. the sign of negative and positive zero is preserved)</li>
  </ul></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>\u03c6</code> - the latitude value in decimal degrees.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the given value clamped to the [-90 … 90]° range, or NaN if the given value was NaN.</dd>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.4</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="Longitude.html#normalize(double)"><code>Longitude.normalize(double)</code></a></dd>
 </dl>
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