hints.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

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<A NAME="DATUM_FACTORY"><!-- --></A><H3>
DATUM_FACTORY</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>DATUM_FACTORY</B></PRE>
<DL>
<DD>The <CODE>DatumFactory</CODE> instance to use.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getDatumFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getDatumFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="COORDINATE_OPERATION_FACTORY"><!-- --></A><H3>
COORDINATE_OPERATION_FACTORY</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>COORDINATE_OPERATION_FACTORY</B></PRE>
<DL>
<DD>The <CODE>CoordinateOperationFactory</CODE> instance to use.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getCoordinateOperationFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getCoordinateOperationFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="COORDINATE_OPERATION_AUTHORITY_FACTORY"><!-- --></A><H3>
COORDINATE_OPERATION_AUTHORITY_FACTORY</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>COORDINATE_OPERATION_AUTHORITY_FACTORY</B></PRE>
<DL>
<DD>The <CODE>CoordinateOperationAuthorityFactory</CODE> instance
 to use.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getCoordinateOperationAuthorityFactory(java.lang.String, org.geotools.factory.Hints)"><CODE>FactoryFinder.getCoordinateOperationAuthorityFactory(java.lang.String, org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="MATH_TRANSFORM_FACTORY"><!-- --></A><H3>
MATH_TRANSFORM_FACTORY</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>MATH_TRANSFORM_FACTORY</B></PRE>
<DL>
<DD>The <CODE>MathTransformFactory</CODE> instance to use.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getMathTransformFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getMathTransformFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="GRID_COVERAGE_PROCESSOR"><!-- --></A><H3>
GRID_COVERAGE_PROCESSOR</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>GRID_COVERAGE_PROCESSOR</B></PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>The  interface is not yet
             stable. Avoid dependencies if possible.</I>
<P>
<DD>The <CODE>GridCoverageProcessor</CODE> instance to use.
<P>
<DL>
</DL>
</DL>
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<A NAME="TILE_ENCODING"><!-- --></A><H3>
TILE_ENCODING</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>TILE_ENCODING</B></PRE>
<DL>
<DD>The <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/tilecodec/TileEncoder.html" title="class or interface in javax.media.jai.tilecodec">tile encoder</A> name
 (as a <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang"><CODE>String</CODE></A> value) to use during serialization of image data in
 a <A HREF="../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A> object. This encoding
 is given to the <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/remote/SerializableRenderedImage.html" title="class or interface in javax.media.jai.remote"><CODE>SerializableRenderedImage</CODE></A>
 constructor. Valid values include (but is not limited to) ,
  and .
 <p>
 <strong>Note:</strong> We recommand to avoid the  codec
 for grid coverages.
<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2.3</DD>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/coverage/FactoryFinder.html#getGridCoverageFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getGridCoverageFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="JAI_INSTANCE"><!-- --></A><H3>
JAI_INSTANCE</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>JAI_INSTANCE</B></PRE>
<DL>
<DD>The <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/JAI.html" title="class or interface in javax.media.jai"><CODE>JAI</CODE></A> instance to use.
<P>
<DL>
</DL>
</DL>
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<A NAME="SAMPLE_DIMENSION_TYPE"><!-- --></A><H3>
SAMPLE_DIMENSION_TYPE</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>SAMPLE_DIMENSION_TYPE</B></PRE>
<DL>
<DD>The <CODE>SampleDimensionType</CODE> to use.
<P>
<DL>
</DL>
</DL>
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<A NAME="DEFAULT_COORDINATE_REFERENCE_SYSTEM"><!-- --></A><H3>
DEFAULT_COORDINATE_REFERENCE_SYSTEM</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>DEFAULT_COORDINATE_REFERENCE_SYSTEM</B></PRE>
<DL>
<DD>The default <CODE>CoordinateReferenceSystem</CODE>
 to use. This is used by some factories capable to provide a default CRS
 when no one were explicitly specified by the user.
<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2.2</DD>
</DL>
</DL>
<HR>

<A NAME="DATUM_SHIFT_METHOD"><!-- --></A><H3>
DATUM_SHIFT_METHOD</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>DATUM_SHIFT_METHOD</B></PRE>
<DL>
<DD>The preferred datum shift method to use for
 coordinate operations.
 Valid values are ,  or .
 Other values may be supplied if a math transform exists for that name, but this is not guaranteed to work.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getCoordinateOperationFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getCoordinateOperationFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
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<A NAME="LENIENT_DATUM_SHIFT"><!-- --></A><H3>
LENIENT_DATUM_SHIFT</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>LENIENT_DATUM_SHIFT</B></PRE>
<DL>
<DD>Tells if coordinate
 operations should be allowed even when a datum shift is required while no method is
 found applicable. It may be for example that no
 <A HREF="../../../org/geotools/referencing/datum/BursaWolfParameters.html" title="class in org.geotools.referencing.datum">Bursa Wolf parameters</A>
 were found for a datum shift. The default value is <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#FALSE" title="class or interface in java.lang"><CODE>FALSE</CODE></A>, which means
 that <A HREF="../../../org/geotools/referencing/operation/DefaultCoordinateOperationFactory.html" title="class in org.geotools.referencing.operation">coordinate operation factory</A> throws an exception if such a case occurs. If this hint is
 set to , then the user is strongly encouraged to check the
 positional accuracy for every transformation created. If the set of positional accuracy
 contains <A HREF="../../../org/geotools/metadata/iso/quality/PositionalAccuracyImpl.html#DATUM_SHIFT_OMITTED"><CODE>DATUM_SHIFT_OMITTED</CODE></A>, this means that an "ellipsoid shift" were applied without real datum
 shift method available, and the transformed coordinates may have one kilometer error. The
 application should warn the user (e.g. popup a message dialog box) in such case.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getCoordinateOperationFactory(org.geotools.factory.Hints)"><CODE>FactoryFinder.getCoordinateOperationFactory(org.geotools.factory.Hints)</CODE></A></DL>
</DL>
<HR>

<A NAME="FORCE_LONGITUDE_FIRST_AXIS_ORDER"><!-- --></A><H3>
FORCE_LONGITUDE_FIRST_AXIS_ORDER</H3>
<PRE>
public static final <A HREF="../../../org/geotools/factory/Hints.Key.html" title="class in org.geotools.factory">Hints.Key</A> <B>FORCE_LONGITUDE_FIRST_AXIS_ORDER</B></PRE>
<DL>
<DD>Tells if the coordinate systems
 created by an authority factory
 should be forced to (<var>longitude</var>,<var>latitude</var>) axis order. This hint is
 especially useful for creating
 
 objects from <A HREF="http://www.epsg.org">EPSG</A> codes. Most
  defined in the EPSG
 database use (<var>latitude</var>,<var>longitude</var>) axis order. Unfortunatly, many data
 sources available in the world uses the opposite axis order and still claim to use a CRS
 described by an EPSG code. This hint allows to handle such data.
 <p>
 This hint shall be passed to the
 <code><A HREF="../../../org/geotools/referencing/FactoryFinder.html#getCRSAuthorityFactory(java.lang.String, org.geotools.factory.Hints)">FactoryFinder.getCRSAuthorityFactory</A>(...)</code> method. Whatever this hint is supported
 or not is authority dependent. In the default Geotools configuration, this hint is supported
 for the  authority.
 <p>
 If this hint is not provided, then the default value depends on many factors including
 <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/System.html#getProperties()" title="class or interface in java.lang">system properties</A> and plugins available in the classpath.
 In Geotools implementation, the default value is usually <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#FALSE" title="class or interface in java.lang"><CODE>FALSE</CODE></A> with
 one exception: If the <code>{@value}</code>
 system property is set to , then the default value is  at least
 for the <A HREF="../../../org/geotools/referencing/factory/epsg/DefaultFactory.html" title="class in org.geotools.referencing.factory.epsg">default EPSG
 factory</A>.
 <p>
 If both the above-cited system property and this hint are provided, then
 this hint has precedence. This allow axis order control on a data store
 basis, and keep the system-wide property as the default value only for
 cases where axis order is unspecified.
<P>
<DL>