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<div class="moz-cite-prefix">Peter,<br>
<br>
I have found that if the map size (width and height in pixels)
aspect ratio does not exactly match the map extents (map units)
aspect ratio the map extents are adjusted.<br>
<br>
I'm working with MapScript and to get exact scale pdf map I have
to set map size first and then extent and then scale to get good
results.<br>
<br>
I hope this helps.<br>
<div class="moz-signature"><br>
<br>
<b>Worth Lutz</b><br>
------------------<br>
<br>
</div>
On 07/24/2014 06:49 AM, Peter Hopfgartner wrote:<br>
</div>
<blockquote cite="mid:53D0E4AB.9010900@r3-gis.com" type="cite">I'm
generating dynamically Map Object, with with a certain extent, in
the concrete example
<br>
629396.05065523,4984079.9894638,655192.92565523,5019084.3644638
<br>
<br>
In generated Map object uses the WMS client functionality to call
WMS services. Anyway, the BBOX get's slightly changed, so that the
original scale of 1:100000 gets changed to approx 1:100103, since
it calls the WMS services with
<br>
629382.807906257,4984062.02007212,655206.168404203,5019102.33385548
<br>
as can be taken from the web server log files:
<br>
<br>
mmm.mmm.mmm.mmm - - [24/Jul/2014:12:25:58 +0200] "GET
/author/services/ows.php?PROJECT=ancitel&MAP=catasto_reti&LANG=xw&OGSTAT=ot3cp0i7qmph4guuof75702m70&RESOLUTION=96&LAYERS=dtm,uso_lombardia,strade_lombardia,g_limiti_amministrativi,g_label,g_0707,g_0704&REQUEST=GetMap&SERVICE=WMS&FORMAT=image/png%3B+mode%3D8bit&STYLES=,,,,,,&HEIGHT=1323&VERSION=1.1.1&SRS=EPSG:32632&WIDTH=975&BBOX=629382.807906257,4984062.02007212,655206.168404203,5019102.33385548&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.ogc.se_inimage
HTTP/1.1" 200 678803 "-" "MapServer/6.4.1 libcurl/7.19.7"
<br>
<br>
This change in scale is beyound te axpected tolerance in this
particular use case, where technical data must be plotted in a PDF
file.
<br>
<br>
Any help is appreciated. Obvioulsly, I can fetch the WMS services
in my code and overlay them "by hand". Anyway, for a couple of
reasons this was the preferred approach.
<br>
<br>
Regards,
<br>
<br>
Peter
<br>
<br>
<br>
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