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<p>So to put it another way this is the reason why Qgis wants to use
a huge amount of memory (40 GB) when I have a lot of raster images
loaded in the background. <br>
</p>
<br>
<div class="moz-cite-prefix">On 16/11/17 18:56, Tim Sutton wrote:<br>
</div>
<blockquote type="cite"
cite="mid:240D3348-E0F6-43AC-8AAF-41371976ED71@kartoza.com">
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Hi<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 16 Nov 2017, at 04:35, Patrick Dunford <<a
href="mailto:enzedrailmaps@gmail.com" class=""
moz-do-not-send="true">enzedrailmaps@gmail.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<p style="white-space: pre-wrap; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">What is this "preview job" function?</p>
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<div>Its application logic to prefetch / pre-render offscreen
content in anticipation of user panning the map.</div>
<div><br class="">
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<div>Regards</div>
<div><br class="">
</div>
<div>Tim</div>
<blockquote type="cite" class="">
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<div style="color: rgb(0, 0, 0);
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class=""><b class="">Tim Sutton</b></div>
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normal; font-weight: normal;
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class=""><b class="">Co-founder:</b><span
class="Apple-converted-space"> </span>Kartoza</div>
<div style="color: rgb(0, 0, 0);
font-family: Helvetica; font-size: 12px;
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0px; line-height: normal;
-webkit-text-stroke-color: rgb(0, 0, 0);"
class=""><b class="">Project chair:</b><span
style="font-weight: normal;" class=""><span
class="Apple-converted-space"> </span><a
href="http://QGIS.org" class=""
moz-do-not-send="true">QGIS.org</a></span></div>
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min-height: 14px;" class=""><br class="">
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0px; line-height: normal;
-webkit-text-stroke-color: rgb(0, 0, 0);"
class="">Visit <a
href="http://kartoza.com/" class=""
moz-do-not-send="true"><span
style="-webkit-text-stroke-color:
rgb(71, 135, 255);" class="">http://kartoza.com</span></a> to
find out about open source:</div>
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0px; line-height: normal;
-webkit-text-stroke-color: rgb(0, 0, 0);"
class="">Desktop GIS programming services</div>
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class="">Geospatial web development</div>
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class="">GIS Training</div>
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font-family: Helvetica; font-size: 12px;
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normal; font-weight: normal;
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0px; line-height: normal;
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class=""><b class="">Skype</b>: timlinux </div>
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font-family: Helvetica; font-size: 12px;
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normal; font-weight: normal;
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font-variant-alternates: normal;
font-variant-east-asian: normal; margin:
0px; line-height: normal;
-webkit-text-stroke-color: rgb(0, 0, 0);"
class=""><b class="">IRC:</b><span
class="Apple-converted-space"> </span>timlinux
on #qgis at <a href="http://freenode.net"
class="" moz-do-not-send="true">freenode.net</a></div>
</span></span></span></span></span></span></span></span></span></div>
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