classogrfeature.html

gdal库的学习文档

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<p>
Set field.<p>
The passed value <a class="el" href="unionOGRField.html">OGRField</a> must be of exactly the same type as the target field, or an application crash may occur. The passed value is copied, and will not be affected. It remains the responsibility of the caller.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#f3cfe4f766f5579f670bb651c53a99ca">OGR_F_SetFieldRaw()</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>iField</em>&nbsp;</td><td>the field to fetch, from 0 to <a class="el" href="classOGRFeature.html#b7f4eb0c098a9456d4005828127cdde0">GetFieldCount()</a>-1. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>puValue</em>&nbsp;</td><td>the value to assign. </td></tr>
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<a class="anchor" name="affef1273673a04dad428e803e6d88a6"></a><!-- doxytag: member="OGRFeature::SetField" ref="affef1273673a04dad428e803e6d88a6" args="(int i, int nCount, GByte *pabyBinary)" -->
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          <td class="memname">void OGRFeature::SetField           </td>
          <td>(</td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>iField</em>, </td>
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          <td class="paramname"> <em>nBytes</em>, </td>
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          <td class="paramtype">GByte *&nbsp;</td>
          <td class="paramname"> <em>pabyData</em></td><td>&nbsp;</td>
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<p>
Set field to binary data.<p>
This method currently on has an effect of OFTBinary fields.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#5dcaa7d3e71f078ae714831f7c5cae1d">OGR_F_SetFieldBinary()</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>iField</em>&nbsp;</td><td>the field to set, from 0 to <a class="el" href="classOGRFeature.html#b7f4eb0c098a9456d4005828127cdde0">GetFieldCount()</a>-1. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nBytes</em>&nbsp;</td><td>bytes of data being set. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>pabyData</em>&nbsp;</td><td>the raw data being applied. </td></tr>
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<a class="anchor" name="80ca40aeda639243275e2d076301b6da"></a><!-- doxytag: member="OGRFeature::SetField" ref="80ca40aeda639243275e2d076301b6da" args="(int i, int nYear, int nMonth, int nDay, int nHour=0, int nMinute=0, int nSecond=0, int nTZFlag=0)" -->
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          <td class="memname">void OGRFeature::SetField           </td>
          <td>(</td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>iField</em>, </td>
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          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nYear</em>, </td>
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          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nMonth</em>, </td>
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          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nDay</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nHour</em> = <code>0</code>, </td>
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          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nMinute</em> = <code>0</code>, </td>
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          <td class="paramname"> <em>nSecond</em> = <code>0</code>, </td>
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          <td class="paramname"> <em>nTZFlag</em> = <code>0</code></td><td>&nbsp;</td>
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<p>
Set field to date.<p>
This method currently only has an effect for OFTDate, OFTTime and OFTDateTime fields.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#627970180a20e2a4b1c7ae694923fd73">OGR_F_SetFieldDateTime()</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>iField</em>&nbsp;</td><td>the field to set, from 0 to <a class="el" href="classOGRFeature.html#b7f4eb0c098a9456d4005828127cdde0">GetFieldCount()</a>-1. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nYear</em>&nbsp;</td><td>(including century) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nMonth</em>&nbsp;</td><td>(1-12) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nDay</em>&nbsp;</td><td>(1-31) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nHour</em>&nbsp;</td><td>(0-23) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nMinute</em>&nbsp;</td><td>(0-59) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nSecond</em>&nbsp;</td><td>(0-59) </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nTZFlag</em>&nbsp;</td><td>(0=unknown, 1=localtime, 100=GMT, see data model for details) </td></tr>
  </table>
</dl>

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<a class="anchor" name="23506b436ea8e88e65aaa6b57bbaa326"></a><!-- doxytag: member="OGRFeature::GetFID" ref="23506b436ea8e88e65aaa6b57bbaa326" args="()" -->
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          <td class="memname">long OGRFeature::GetFID           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [inline]</code></td>
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<p>
Get feature identifier.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#95bc391bf7883a8732a523d525c26a00">OGR_F_GetFID()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>feature id or OGRNullFID if none has been assigned. </dd></dl>

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<a class="anchor" name="9abfc256b2d1758761fa54ca3395029b"></a><!-- doxytag: member="OGRFeature::SetFID" ref="9abfc256b2d1758761fa54ca3395029b" args="(long nFID)" -->
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          <td class="memname">OGRErr OGRFeature::SetFID           </td>
          <td>(</td>
          <td class="paramtype">long&nbsp;</td>
          <td class="paramname"> <em>nFID</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [virtual]</code></td>
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<p>
Set the feature identifier.<p>
For specific types of features this operation may fail on illegal features ids. Generally it always succeeds. Feature ids should be greater than or equal to zero, with the exception of OGRNullFID (-1) indicating that the feature id is unknown.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#09d01eea41746751db62da123887e787">OGR_F_SetFID()</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>nFID</em>&nbsp;</td><td>the new feature identifier value to assign.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>On success OGRERR_NONE, or on failure some other value. </dd></dl>

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<a class="anchor" name="4966b71e0d67f1bfcddac4240b18a506"></a><!-- doxytag: member="OGRFeature::DumpReadable" ref="4966b71e0d67f1bfcddac4240b18a506" args="(FILE *)" -->
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          <td class="memname">void OGRFeature::DumpReadable           </td>
          <td>(</td>
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          <td class="paramname"> <em>fpOut</em>          </td>
          <td>&nbsp;)&nbsp;</td>
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<p>
Dump this feature in a human readable form.<p>
This dumps the attributes, and geometry; however, it doesn't definition information (other than field types and names), nor does it report the geometry spatial reference system.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#e38d330f942798fcbaaf27e5807fb567">OGR_F_DumpReadable()</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>fpOut</em>&nbsp;</td><td>the stream to write to, such as stdout. If NULL stdout will be used. </td></tr>
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<a class="anchor" name="8ebc0999c4bce0b5073add16598dfc77"></a><!-- doxytag: member="OGRFeature::SetFrom" ref="8ebc0999c4bce0b5073add16598dfc77" args="(OGRFeature *, int=TRUE)" -->
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          <td class="memname">OGRErr OGRFeature::SetFrom           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classOGRFeature.html">OGRFeature</a> *&nbsp;</td>
          <td class="paramname"> <em>poSrcFeature</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>bForgiving</em> = <code>TRUE</code></td><td>&nbsp;</td>
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<p>
Set one feature from another.<p>
Overwrite the contents of this feature from the geometry and attributes of another. The poSrcFeature does not need to have the same <a class="el" href="