anchor.diff:            </dl>
             <dl class='sources_row'>
               <dt>Geographical coverage</dt>
  -            <dd>Global</dd>
  +            <dd>Global land (excluding Antarctica and Arctic islands)</dd>
             </dl>
             <dl class='sources_row even'>
               <dt>Source data</dt>
  
positive.code:         <div class='source_table'>
            <dl class='sources_row'>
              <dt>Function</dt>
              <dd>Shows the extent of global tree cover, displayed by percentage, for the year 2000</dd>
            </dl>
            <dl class='sources_row even'>
              <dt>Resolution/scale</dt>
  
negative.code:           <dl class='sources_row'>
              <dt>Date of content</dt>
              <dd>2000</dd>
            <dl class='sources_row'>
              <dt>Cautions</dt>
              <dd>For the purpose of this study, “tree cover” was defined as all vegetation taller than 5m in height. “Tree cover” is the biophysical presence of trees and may take the form of natural forests or plantations existing over a range of canopy densities.</dd>
            </dl>
          </div>
  
          <div class='source_summary'>
            <h3 class='overview_title'>Overview</h3>
            <p>This data set displays tree cover over all global land (except for Antarctica and a number of Arctic islands) for the year 2000 at 30 × 30 meter resolution. “Percent tree cover” is defined as the density of tree canopy coverage of the land surface and is color-coded by density bracket (see legend).</p>
            <p>Data in this layer were generated using multispectral satellite imagery from the <a href="http://landsat.usgs.gov/" target="_blank">Landsat 7 thematic mapper plus (ETM+)</a> sensor. The clear surface observations from over 600,000 images were analyzed using Google Earth Engine, a cloud platform for earth observation and data analysis, to determine per pixel tree cover using a supervised learning algorithm.</p>
  
            <p class='credits'><strong>Citation:</strong> Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. 2013. “High-Resolution Global Maps of 21st-Century Forest Cover Change.” <em>Science</em> 342 (15 November): 850–53.</p>
  
  