anchor.diff:            </dl>
             <dl class='sources_row even'>
               <dt>RESOLUTION / SCALE</dt>
  -            <dd>0.00025 decimal degrees or approximately 27.8 x 27.8 meters at the equator</dd>
  +            <dd>30 × 30 meters</dd>
             </dl>
             <dl class='sources_row'>
               <dt>Geographic coverage</dt>
  
positive.code:           </dl>
            <dl class='sources_row even'>
              <dt>RESOLUTION / SCALE</dt>
              <dd>0.00025 decimal degrees or approximately 27.8 x 27.8 meters at the equator</dd>
            </dl>
            <dl class='sources_row'>
              <dt>Geographic coverage</dt>
  
negative.code:           </dl>
            <dl class='sources_row even'>
              <dt>Source data</dt>
              <dd><a href='http://landsat.usgs.gov/index.php' target='_blank'>Landsat</a></dd>
            </dl>
            <dl class='sources_row'>
              <dt>Frequency of updates</dt>
  