<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:12.0pt'>Hello,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>I’m using QGIS as a
redistributable platform for a large GIS project that spans all of western
North America. The project has 36 layers 8 of which are large raster
datasets (*.img files). Some of the rasters are ~350mb each. I’m
running the latest version 1.4.0-2. I am running it on a pretty powerful
workstation (windows XP) and am using the osgeo4w version. My primary user is
using a MacBook Pro with Leopard and is using the standalone version. He
is experiencing pretty poor performance. </span>It moves very very
slowly, each operation. Even turning off/on simple layers is taking up to
45 seconds. This occurs even if there are a handful of base layers turned on.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve seen some discussion of slow start up issues and
raster rendering issues. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Would JasPer effect *.img rendering? If so how can I
determine if I or my MacBook user are running that? <o:p></o:p></p>
<p class=MsoNormal>Does QGIS utilize *.rrd pyramid files generated by ArcGIS?<o:p></o:p></p>
<p class=MsoNormal>I’ve also generated spatial indices for all the vector
layers. Any other suggestions on how to improve performance or test for
the bottle neck would be greatly appreciated.<o:p></o:p></p>
<p class=MsoNormal>Thanks<o:p></o:p></p>
<p class=MsoNormal>Kurt<span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>**************************<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>Kurt Menke, GISP<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>Bird’s Eye
View <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'><a
href="http://www.birdseyeviewgis.com/" title="http://www.birdseyeviewgis.com/"><span
style='color:blue'>www.BirdsEyeViewGIS.com</span></a> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>Work:
505-265-0243<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:black'>Cell:
505-362-1776<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</body>
</html>