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    <title>topic Classifying Landsat 8 imagery;  How to Detect Recent Forest Harvests in Data Management Questions</title>
    <link>https://community.esri.com/t5/data-management-questions/classifying-landsat-8-imagery-how-to-detect-recent/m-p/706676#M40032</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I would like to classify Landsat 8 imagery so I can quantify &lt;/SPAN&gt;&lt;STRONG&gt;Recently Harvested/Disturbed Forested Areas &lt;/STRONG&gt;&lt;SPAN&gt;.&amp;nbsp;&amp;nbsp;&amp;nbsp; I am interested in doing this for multiple scenes over large areas.&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; My idea is to create training classes primarily in recently harvested areas,&amp;nbsp; (those which I can see on 2012 NAIP ortho imagery),&amp;nbsp; but also in young forests,&amp;nbsp; mature forests,&amp;nbsp; urban areas, grasslands/shrublands and water.&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; I plan on doing this separately for each scene using a 5,4,3 composite image to run the classification.&amp;nbsp;&amp;nbsp; I will likely have trouble distinguishing between classes like young and mature forests,&amp;nbsp;&amp;nbsp; but I'm mostly concerned with the areas that are recently harvested.&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; Once each scene is classified in this manner I will mosaic the resulting classes, as opposed to mosaicing the images before classification.&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; Any criticisms, help or general suggestions would be greatly appreciated. &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Tim&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Mon, 21 Oct 2013 16:45:05 GMT</pubDate>
    <dc:creator>TLeed</dc:creator>
    <dc:date>2013-10-21T16:45:05Z</dc:date>
    <item>
      <title>Classifying Landsat 8 imagery;  How to Detect Recent Forest Harvests</title>
      <link>https://community.esri.com/t5/data-management-questions/classifying-landsat-8-imagery-how-to-detect-recent/m-p/706676#M40032</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I would like to classify Landsat 8 imagery so I can quantify &lt;/SPAN&gt;&lt;STRONG&gt;Recently Harvested/Disturbed Forested Areas &lt;/STRONG&gt;&lt;SPAN&gt;.&amp;nbsp;&amp;nbsp;&amp;nbsp; I am interested in doing this for multiple scenes over large areas.&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; My idea is to create training classes primarily in recently harvested areas,&amp;nbsp; (those which I can see on 2012 NAIP ortho imagery),&amp;nbsp; but also in young forests,&amp;nbsp; mature forests,&amp;nbsp; urban areas, grasslands/shrublands and water.&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; I plan on doing this separately for each scene using a 5,4,3 composite image to run the classification.&amp;nbsp;&amp;nbsp; I will likely have trouble distinguishing between classes like young and mature forests,&amp;nbsp;&amp;nbsp; but I'm mostly concerned with the areas that are recently harvested.&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; Once each scene is classified in this manner I will mosaic the resulting classes, as opposed to mosaicing the images before classification.&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; Any criticisms, help or general suggestions would be greatly appreciated. &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Tim&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 21 Oct 2013 16:45:05 GMT</pubDate>
      <guid>https://community.esri.com/t5/data-management-questions/classifying-landsat-8-imagery-how-to-detect-recent/m-p/706676#M40032</guid>
      <dc:creator>TLeed</dc:creator>
      <dc:date>2013-10-21T16:45:05Z</dc:date>
    </item>
    <item>
      <title>Re: Classifying Landsat 8 imagery;  How to Detect Recent Forest Harvests</title>
      <link>https://community.esri.com/t5/data-management-questions/classifying-landsat-8-imagery-how-to-detect-recent/m-p/706677#M40033</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Tim,&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;The following article might help you:&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;A href="ftp://ftp.ciat.cgiar.org/DAPA/users/secastano/DATOS-LLANO/NATHALIE%20BEAULIUE/Data%20pasture%20degradation%20llanos%20for%20Glenn/Degradapas-carimagua/varios/Hoffhine-and-Sader2002.pdf"&gt;Detection of forest harvest type using multiple dates of Landsat TM imagery&lt;/A&gt;&lt;SPAN&gt;.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;A href="http://www.isprs.org/proceedings/XXXI/congress/part7/602_XXXI-part7.pdf"&gt;Forest Classification of Multitemporal Mosaicked Satellite Images&lt;/A&gt;&lt;SPAN&gt;.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Regards,&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 22 Oct 2013 08:39:52 GMT</pubDate>
      <guid>https://community.esri.com/t5/data-management-questions/classifying-landsat-8-imagery-how-to-detect-recent/m-p/706677#M40033</guid>
      <dc:creator>NidhinKarthikeyan</dc:creator>
      <dc:date>2013-10-22T08:39:52Z</dc:date>
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