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Hi Oliver,
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<div>Here's a live URL demonstrating the problem: <a href="http://mt0.geosmart.co.nz/mapproxy/service?service=WMS&request=GetMap&version=1.1.1&layers=geosmart:traffic_nz_test&styles=&format=image/png&transparent=true&height=256&width=256&cql_filter=status='current' AND (priority='0' OR priority='1' OR priority='2' OR priority='3' OR priority='7')&srs=EPSG:3857&bbox=19455363.93536934,-4422340.708467157,19460255.905179594,-4417448.7386569055">http://mt0.geosmart.co.nz/mapproxy/service?service=WMS&request=GetMap&version=1.1.1&layers=geosmart:traffic_nz_test&styles=&format=image/png&transparent=true&height=256&width=256&cql_filter=status='current'%20AND%20(priority='0'%20OR%20priority='1'%20OR%20priority='2'%20OR%20priority='3'%20OR%20priority='7')&srs=EPSG:3857&bbox=19455363.93536934,-4422340.708467157,19460255.905179594,-4417448.7386569055</a></div>
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<div>The requested layer merges the following sources (from bottom to top):</div>
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<div>- Traffic flow depicted as coloured lines</div>
<div>- Road labels</div>
<div>- Traffic incident icons</div>
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<div>The first time the image is requested the source layers are merged correctly, on subsequent requests when the road labels are retrieved from the cache they obscure the traffic flow beneath.</div>
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<div>Regards<br>
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<b><span style="font-size: 10pt; font-family: Arial, sans-serif; color: blue; "><br class="Apple-interchange-newline">
Adam Ratcliffe</span></b><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; "><font color="#0000ff" face="Arial, sans-serif"><span style="font-size: 13px; "><b>Software Developer</b></span></font></div>
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<b><span style="font-size: 10pt; font-family: Arial, sans-serif; color: blue; ">GeoSmart</span></b><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">PO Box 101001</span><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">29 Apollo Drive, Mairangi Bay, Auckland, NZ</span><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">Ph: +64 9 966 8757</span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">Fx: +64 9 966 8721</span><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">Email: </span><span style="font-family: Arial, sans-serif; color: rgb(31, 73, 125); "><a href="mailto:Phil.Allen@geosmart.co.nz" style="color: purple; "><span style="font-size: 7.5pt; color: blue; ">adam.ratcliffe@geosmart.co.nz</span></a></span><span style="color: rgb(31, 73, 125); "><o:p></o:p></span></div>
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<span style="font-size: 7.5pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); ">Web: </span><span style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(31, 73, 125); "><a href="http://www.geosmart.co.nz/" style="color: purple; "><span style="font-size: 7.5pt; color: blue; ">www.GeoSmart.co.nz</span></a></span></div>
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<div>On 20/02/2013, at 9:11 PM, Oliver Tonnhofer <<a href="mailto:olt@omniscale.de">olt@omniscale.de</a>></div>
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<blockquote type="cite">Hi Adam,<br>
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On 15.02.2013, at 02:31, Adam Ratcliffe wrote:<br>
<blockquote type="cite">A sample request from a Leaflet client looks like this: <a href="http://mapproxy.geosmart.co.nz/service?SERVICE=WMS&REQUEST=GetMap&VERSION=1.1.1&LAYERS=geosmart:traffic_incidents_nz&format=image/png&TRANSPARENT=true&HEIGHT=256&WIDTH=256&CQL_FILTER=status='current'%20AND%20(priority='0'%20OR%20priority='1'%20OR%20priority='2'%20OR%20priority='3'%20OR%20priority='7')">
http://mapproxy.geosmart.co.nz/service?SERVICE=WMS&REQUEST=GetMap&VERSION=1.1.1&LAYERS=geosmart:traffic_incidents_nz&format=image/png&TRANSPARENT=true&HEIGHT=256&WIDTH=256&CQL_FILTER=status='current'%20AND%20(priority='0'%20OR%20priority='1'%20OR%20priority='2'%20OR%20priority='3'%20OR%20priority='7')</a><br>
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Do you have a working example request (with BBOX/SRS) to reproduce this?<br>
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Regards,<br>
Oliver<br>
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-- <br>
Oliver Tonnhofer | Omniscale GmbH & Co KG | <a href="http://omniscale.com">
http://omniscale.com</a><br>
<a href="http://mapproxy.org">http://mapproxy.org</a> | <a href="https://github.com/olt">
https://github.com/olt</a> | @oltonn<br>
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