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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi there,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am currently investigating a way to 'smooth out' water bodies in a DEM, where the water bodies are initially marked as NODATA, and are then interpolated from the surrounding ground pixels. Currently the water varies
in height as a result in slighy variations in the shore height, ideally I'd like to average that to a single value, specific for each water body.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have tried using the python script gdal_fillnodata, this works fine but if I try to use the -si option the NODATA (water) regions are never filled.. as per the bug ticket:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="http://trac.osgeo.org/gdal/ticket/3988">http://trac.osgeo.org/gdal/ticket/3988</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">.. so the water remains textured / sloping.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">short of this working I am proposing to define a mask / polygon for each water body in a scene and calculate the average, replacing the target pixels.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">anyone have any suggestions why gdal_fillnodata is broken, or an efficient method of forcing water bodies to be the same height ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">cheers and kudos as always to the GDAL community<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-i<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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