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<p class="caption"><span class="caption-text">The geographic layout of the White Oak Bayou watershed. Whiteoak Bayou is a tributary for the Buffalo Bayou River (Harris County, Texas).</span><a class="headerlink" href="#id12" title="Permalink to this image"></a></p>
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<p>In order to use NASAaccess we also need a digital elevation model (DEM) raster layer. Let’s see the White Oak Bayou watershed DEM and a more closer lo