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<div class="contents"> 
 <h2><a name="KSEC3">GRIB section 3, the bitmap section</a></h2> 
 <p>An INTEGER array of at least 2 elements. </p> 
 <p> </p> 
 <table border="3"> 
  <caption>
   <strong> Contents of KSEC3 </strong>
  </caption>
  <tbody> 
   <tr> 
    <th> Element </th> 
    <th> Contents </th> 
    <th style="vertical-align: middle;"> GRIB API keys<br /> </th> 
   </tr> 
   <tr> 
    <td> 1 </td> 
    <td> <pre>0          A bitmap is included in the GRIB message.<br />           The data array PSEC4 contains a value which serves as a<br />           missing data indicator for use at missing data points.<br /><br />Non-zero   The number of a predefined bitmap.<br />           The bitmap is not included in the message. The binary<br />           data array contains only valid data values; missing<br />           points are suppressed.</pre></td> 
    <th style="vertical-align: top;">
     <div align="left">
      bitmapPresent
      <br /> 
     </div></th> 
   </tr> 
   <tr> 
    <td> 2 <p> </p> </td> 
    <td> The value used at missing data points in an INTEGER data field. This value must be supplied for both encoding and decoding. </td> 
    <th style="vertical-align: top;">
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      missingValue
      <br /> 
     </div></th> 
   </tr> 
  </tbody> 
 </table> 
</div>