anchor.diff:    <ul class='sources'>
       <li id='forest2000' class='source-item first'>
         <div class='source_header'>
  -        <strong class='source_title'>Tree cover extent</strong>
  +        <strong class='source_title'>Tree cover</strong>
           <i class='expand_arrow'></i>
         </div>
   
  
positive.code: <article id='earth_engine' class="source-article">
    <h2 class='source_category_title'>GFW on Google Earth Engine</h2>
    <div class='single-source-item'>
      <p>The following data sets on Global Forest Watch were created using <a href="http://earthengine.google.org" target="_blank">Google Earth Engine</a>, Google's geospatial analysis tool: the University of Maryland/Google's annual tree cover loss, tree cover gain, and tree cover extent data, and the Landsat base maps.</p>
  
      <p>Additionally, the tropical forest carbon stocks layer is being stored and served from <a href="http://mapsengine.google.com/" target="_blank">Google Maps Engine</a> and styled by Earth Engine, the Imazon SAD data are created using Imazon's algorithms on Earth Engine, and analyses of the University of Maryland/Google data, as well as computations of area, are being performed by Earth Engine.</p>
  
  
negative.code:     <p><strong>Figures:</strong> type of forest, economic value of the forestry sector, employment, carbon stocks, emissions</p>
  
      <h3 class='overview_title'>University of Maryland (UMD)/Google</h3>
      <p>Figures for tree cover and tree cover loss and gain presented on the country and global overview pages were calculated using tabular data from a 2013 publication, “<a href='http://www.sciencemag.org/content/342/6160/850' target='_blank'>High-Resolution Global Maps of 21st-Century Forest Cover Change</a>" by Hansen <em>et al</em>.</p>
  
      <p>To learn more, visit the <%= link_to 'Forest Change tab', "#{sources_path}#forest_change" %> on the Data page.</p>
  
      <p><strong>Figures:</strong> UMD/Google circle graphs, 2000 tree cover, all global overview graphs and rankings</p>
  
      <h3 class='overview_title'>European Space Agency (GlobCover)</h3>
      <p>Data from the European Space Agency’s GlobCover was used to visualize tree cover on the country profiles. As stated on the <a href='http://due.esrin.esa.int/globcover/' target='_blank'>ESA website</a>, GlobCover is an initiative which began in 2005 in partnership with a number of organizations. The aim of the project was to develop a service capable of delivering global composites and land cover maps using input observations from the 300m MERIS sensor on board the ENVISAT satellite mission. ESA makes available the land cover maps, which cover 2 periods: December 2004 - June 2006 and January - December 2009. To learn more, visit the <a href='http://due.esrin.esa.int/globcover/' target='_blank'>GlobCover website</a> or <a href='http://due.esrin.esa.int/globcover/LandCover2009/Globcover2009_V2.3_Global_.zip' target='_blank'>download the 2009 GlobCover map</a>.</p>
  
      <p><strong>Figures:</strong> Map of tree cover</p>
  
      <h3 class='overview_title'>The Rights and Resources Initiative (RRI)</h3>
      <p>Figures on forest tenure come from the Rights and Resource Initiative and are based on data adapted from the <a href='http://www.rightsandresources.org/documents/index.php?pubID=1075' target='_blank'>Tropical Forest Tenure Assessment</a>. The goal of the report is to present and analyze the state of forest tenure in much of the world’s tropical forests. As stated on <a href='http://www.rightsandresources.org/programs.php?id=237' target='_blank'>RRI's website</a>, the tenure systems represented by this data is sourced from governments, and therefore only reflects those systems of natural resource management that are legally recognized by those governments. Such officially outlined tenure systems fall under the category of statutory tenure regimes within these studies. The official data often presents an incomplete picture of the institutions that actually manage natural resources, particularly at a local level. To learn more, visit the <a href='http://www.rightsandresources.org/programs.php?id=237' target='_blank'>RRI forest tenure page</a>.</p>
  