anchor.diff:            <dl class='sources_row'>
               <dt>Cautions</dt>
               <dd>
  -              <p>The world IFL map was created through visual interpretation of Landsat images by experts and may contain inconsistencies and inaccuracies because of limitations in the spatial resolution of the imagery and lack of ancillary information about local land-use practices in some regions. In addition, the treatment of fire as a form of degradation in the IFL methodology may vary from the understanding of fire dynamics in different regions and ecozones.</p>
  +              <dd>The world IFL map was created through visual interpretation of Landsat images by experts. The map may contain inaccuracies due to limitations in the spatial resolution of the imagery and lack of ancillary information about local land-use practices in some regions. In addition, the methodology assumes that fire scars in proximity to roads or other infrastructure have been caused by humans, and therefore constitute a form of significant human activity. This assumption could result in an underestimation of  IFL extent in the boreal ecozone. The attribution of forest fires to human influence across boreal forest landscapes is disputed.</dd>
               </dd>
             </dl>
           </div>
   
           <div class='source_summary'>
             <h3 class='overview_title'>Overview</h3>
  -          <p>The Intact Forest Landscapes (IFL) data set identifies unbroken expanses of natural ecosystems within the zone of forest extent that show no signs of significant human activity and are large enough that all native biodiversity, including viable populations of wide-ranging species, could be maintained. To map IFL areas, a set of criteria was developed and designed to be globally applicable and easily replicable, the latter to allow for repeated assessments over time as well for verification. IFL areas were defined as unfragmented landscapes, at least 50,000 hectares in size, and with a minimum width of 10 kilometers. These were then mapped and identified from Landsat satellite imagery for the year 2013.</p>
  -
  +          <p>The <a href='http://intactforests.org/' target='_blank'>Intact Forest Landscapes</a> (IFL) data set identifies unbroken expanses of natural ecosystems within the zone of forest extent that show no signs of significant human activity and are large enough that all native biodiversity, including viable populations of wide-ranging species, could be maintained. To map IFL areas, a set of criteria was developed and designed to be globally applicable and easily replicable, the latter to allow for repeated assessments over time as well for verification. IFL areas were defined as unfragmented landscapes, at least 50,000 hectares in size, and with a minimum width of 10 kilometers. These were then mapped and identified from Landsat satellite imagery for the year 2013.</p>
             <p>Changes in the extent of IFLs were identified by contrasting the map for 2013 with the analogous map for 2000, adjusted for consistency. Areas identified as “reduction in extent” met the IFL criteria in 2000, but no longer met the criteria in 2013. The main causes of change were industrial activity such as logging and mining, and fragmentation due to infrastructure and new roads, and fires assumed to be caused by humans.</p>
   
             <p>This data can be used to assess forest intactness, alteration, and degradation at global and regional scales. More information about the dataset and methodology is available on <a href="www.intactforests.org">www.intactforests.org</a></p>
  
positive.code:         <div class='source_table'>
            <dl class='sources_row'>
              <dt>Function</dt>
              <dd>Identifies the world’s last remaining undisturbed forest areas, large enough to retain all native biodiversity and showing no signs of human activity as of the year 2013 and reduction in extent from 2000-2013.</dd>
            </dl>
            <dl class='sources_row even'>
              <dt>RESOLUTION / SCALE</dt>
  
negative.code: 
          <div class='source_summary'>
            <h3 class='overview_title'>Overview</h3>
            <p>The <a href='http://intactforests.org/' target='_blank'>Intact Forest Landscapes</a> (IFL) data set identifies unbroken expanses of natural ecosystems within the zone of forest extent, areas that show no signs of significant human activity and are large enough that all native biodiversity, including viable populations of wide-ranging species, could be maintained. To map IFL areas, a set of criteria was developed and designed to be globally applicable and easily replicable, the latter to allow for repeated assessments over time as well for verification. These were then mapped and identified from <a href='http://landsat.usgs.gov/' target='_blank'>Landsat</a> satellite imagery for the year 2000. The landscapes identified as unfragmented were at least 50,000 hectares in size with a minimum width of 10 kilometers. This data can be used to assess forest intactness, alteration, and degradation at global and regional scales. </p>
  
  <p>Changes in the extent of IFLs were identified by contrasting the map for 2013 with the analogous map for 2000, adjusted for consistency. Areas identified as “reduction in extent” met the IFL criteria in 2000, but no longer met the criteria in 2013. The main causes of change were industrial activity such as logging and mining, and fragmentation due to infrastructure and new roads, and fires assumed to be caused by humans.</p>
  
  