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<p>What kind of raster file? What format and what specifics?</p>
<p>I'd recommend you use a format that is binary and internally
tiled, e.g. GeoTIFF with TILES=YES. That way access to such areas
is as efficient as can be.</p>
<p>49 neighbors is quite excessive, maybe simply downsampling your
raster with an appropriate filter/interpolator would achieve the
result you need?<br>
</p>
<div class="moz-cite-prefix">On 17.03.24 15:25, Langers, Fransje via
QGIS-User wrote:<br>
</div>
<blockquote type="cite"
cite="mid:AM9PR01MB8377DA8EE03984FEA1ECCB308F2E2@AM9PR01MB8377.eurprd01.prod.exchangelabs.com">
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<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">I work with QGIS 3.34.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">I have a raster input file, with cell size
5*5m, and with values 1 and 0.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">I want to use r.neighbors (operation average),
.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">When I choose a small neighborhood size of 3,
everything goes fine.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">For my analyses I need to choose a neighborhood
size of 49 (representing a 250m diameter).
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB">It seems this operation is too large, as I get
no result (not responding). What can I do?
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Verdana",sans-serif"
lang="EN-GB"><o:p> </o:p></span></p>
</div>
<br>
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