classogrpoint.html

gdal库的学习文档

          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nDimension</em>          </td>
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<p>
Set the coordinate dimension.<p>
This method sets the explicit coordinate dimension. Setting the coordinate dimension of a geometry to 2 should zero out any existing Z values. Setting the dimension of a geometry collection will not necessarily affect the children geometries.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>nNewDimension</em>&nbsp;</td><td>New coordinate dimension value, either 2 or 3. </td></tr>
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<p>
Reimplemented from <a class="el" href="classOGRGeometry.html#79f84a2b948d511f28c47c47577dea49">OGRGeometry</a>.
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<a class="anchor" name="0eef5e2d9e0edeca0e0f06c7527facb4"></a><!-- doxytag: member="OGRPoint::setX" ref="0eef5e2d9e0edeca0e0f06c7527facb4" args="(double xIn)" -->
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          <td class="memname">void OGRPoint::setX           </td>
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          <td class="paramtype">double&nbsp;</td>
          <td class="paramname"> <em>xIn</em>          </td>
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<p>
Assign point X coordinate.<p>
There is no corresponding SFCOM method. 
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<a class="anchor" name="b064eaaedb2140ed1410e7c2ce4ad1ca"></a><!-- doxytag: member="OGRPoint::setY" ref="b064eaaedb2140ed1410e7c2ce4ad1ca" args="(double yIn)" -->
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          <td class="memname">void OGRPoint::setY           </td>
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          <td class="paramtype">double&nbsp;</td>
          <td class="paramname"> <em>yIn</em>          </td>
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<p>
Assign point Y coordinate.<p>
There is no corresponding SFCOM method. 
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<a class="anchor" name="4330c36258125d939a4ecbbc3bfe66ce"></a><!-- doxytag: member="OGRPoint::setZ" ref="4330c36258125d939a4ecbbc3bfe66ce" args="(double zIn)" -->
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          <td class="memname">void OGRPoint::setZ           </td>
          <td>(</td>
          <td class="paramtype">double&nbsp;</td>
          <td class="paramname"> <em>zIn</em>          </td>
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<p>
Assign point Z coordinate. Setting a zero zIn value will make the point 2D, and setting a non-zero value will make the point 3D (wkbPoint|wkbZ).<p>
There is no corresponding SFCOM method. 
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<a class="anchor" name="4e04bfdd79cbf0c74d90ef20e99f13a3"></a><!-- doxytag: member="OGRPoint::Equals" ref="4e04bfdd79cbf0c74d90ef20e99f13a3" args="(OGRGeometry *) const " -->
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          <td class="memname">OGRBoolean OGRPoint::Equals           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classOGRGeometry.html">OGRGeometry</a> *&nbsp;</td>
          <td class="paramname"> <em>poOther</em>          </td>
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<p>
Returns two if two geometries are equivalent.<p>
This method is the same as the C function OGR_G_Equal().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>TRUE if equivalent or FALSE otherwise. </dd></dl>

<p>
Implements <a class="el" href="classOGRGeometry.html#e751513a46c7e7b154796bfe494faf16">OGRGeometry</a>.
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<a class="anchor" name="0091bfd6873ac20e5f163a15d52d2a98"></a><!-- doxytag: member="OGRPoint::getGeometryName" ref="0091bfd6873ac20e5f163a15d52d2a98" args="() const" -->
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          <td class="memname">const char * OGRPoint::getGeometryName           </td>
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          <td class="paramname">          </td>
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          <td width="100%"> const<code> [virtual]</code></td>
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<p>
Fetch WKT name for geometry type.<p>
There is no SFCOM analog to this method.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#18121f835b2fb724a0c1a87beb1a437a">OGR_G_GetGeometryName()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>name used for this geometry type in well known text format. The returned pointer is to a static internal string and should not be modified or freed. </dd></dl>

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Implements <a class="el" href="classOGRGeometry.html#b9c97ddc4876f1aa563cc4c075bfb251">OGRGeometry</a>.
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<a class="anchor" name="678940f393575777a8e629e46b1292ab"></a><!-- doxytag: member="OGRPoint::getGeometryType" ref="678940f393575777a8e629e46b1292ab" args="() const" -->
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          <td class="memname">OGRwkbGeometryType OGRPoint::getGeometryType           </td>
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<p>
Fetch geometry type.<p>
Note that the geometry type may include the 2.5D flag. To get a 2D flattened version of the geometry type apply the wkbFlatten() macro to the return result.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#8fae58102f5c4a4cf2526e5ca8369a76">OGR_G_GetGeometryType()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the geometry type code. </dd></dl>

<p>
Implements <a class="el" href="classOGRGeometry.html#26fef0fc5e95c9e8e526922476c778bd">OGRGeometry</a>.
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<a class="anchor" name="351482d4852285a214ac1d55ec046356"></a><!-- doxytag: member="OGRPoint::transform" ref="351482d4852285a214ac1d55ec046356" args="(OGRCoordinateTransformation *poCT)" -->
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          <td class="memname">OGRErr OGRPoint::transform           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classOGRCoordinateTransformation.html">OGRCoordinateTransformation</a> *&nbsp;</td>
          <td class="paramname"> <em>poCT</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [virtual]</code></td>
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<p>
Apply arbitrary coordinate transformation to geometry.<p>
This method will transform the coordinates of a geometry from their current spatial reference system to a new target spatial reference system. Normally this means reprojecting the vectors, but it could include datum shifts, and changes of units.<p>
Note that this method does not require that the geometry already have a spatial reference system. It will be assumed that they can be treated as having the source spatial reference system of the <a class="el" href="classOGRCoordinateTransformation.html">OGRCoordinateTransformation</a> object, and the actual SRS of the geometry will be ignored. On successful completion the output <a class="el" href="classOGRSpatialReference.html">OGRSpatialReference</a> of the <a class="el" href="classOGRCoordinateTransformation.html">OGRCoordinateTransformation</a> will be assigned to the geometry.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#59a5b3f954b11cfbf6e78807c28d6090">OGR_G_Transform()</a>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>poCT</em>&nbsp;</td><td>the transformation to apply.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>OGRERR_NONE on success or an error code. </dd></dl>

<p>
Implements <a class="el" href="classOGRGeometry.html#a9e8bfb3c2129f25cf622660f734e1ba">OGRGeometry</a>.
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<a class="anchor" name="efb1c9e09c101735d8617f30109b3685"></a><!-- doxytag: member="OGRPoint::flattenTo2D" ref="efb1c9e09c101735d8617f30109b3685" args="()" -->
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          <td class="memname">void OGRPoint::flattenTo2D           </td>
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<p>
Convert geometry to strictly 2D. In a sense this converts all Z coordinates to 0.0.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#fdb7354b55c7448b60b44cd9e36073b8">OGR_G_FlattenTo2D()</a>. 
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Implements <a class="el" href="classOGRGeometry.html#aae1a2ced937a5900b2bfeb717bad6c9">OGRGeometry</a>.
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="ogr__geometry_8h-source.html">ogr_geometry.h</a><li>ogrpoint.cpp</ul>
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