Gerard<br> Postgis calculate the extents for each mapserver requisition (for each tile) and mapserver draws it with your symbolization. In this case the extents of a particular tile do not involve the point with you want to draw but the contiguous tile involve. The problem is that the symbol size you are drawing to a particular tile (one requisition) is big than virtual invade the area os another tile (another requisition) but this last requisiton not contains this point (and didn't draw it).
<br> I think that there is no way to eliminate this problem for all cases because of tiling method of google maps but you may ask for mapserver-users list about simbolization issues.<br>Regards,<br><br>-- <br>Marco Vieira
<br>+55 21 9499-6800<br>e-mail: <a href="mailto:maovieira@gmail.com">maovieira@gmail.com</a>
<br><br><div><span class="gmail_quote">2007/1/8, Gerard Troost <<a href="mailto:Gerard.Troost@sovon.nl">Gerard.Troost@sovon.nl</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div><font face="Arial" size="2"><span>Hi
all,</span></font></div>
<div><font face="Arial" size="2"><span></span></font> </div>
<div><font face="Arial" size="2"><span>Last week i used
some time to configure our mapserver as wms-server and after that adding an
wms-layers to Google Maps. In basic this has not to be very difficult
but, some strange things took lots of time. Last weekend i've get
everything working an i must say, is works good.</span></font></div>
<div><font face="Arial" size="2"><span></span></font> </div>
<div><font face="Arial" size="2"><span>But </span></font><font face="Arial" size="2"><span>now i have everything working i have 2 questions
left.</span></font></div>
<div><font face="Arial" size="2"><span></span></font> </div>
<div><font face="Arial" size="2"><span>A. The attached
picture is a (part of) an WMS layer projected on Google Maps. Everything looks
fine but if you take a closer look you can see that the points 7 and the lower
right point not drawn correctly because they are plotted near an imageborder
(Google Maps downloads each layer in tiles.). </span></font></div>
<div><font face="Arial" size="2"><span>How can i solve this
problem?</span></font></div>
<div><font face="Arial" size="2"><span></span></font> </div>
<div><font face="Arial" size="2"><span>B. I find out that
the WMS extent for postgis layers is not calculated automaticly. If i add an
layer based on a shape file it calculated wms extent automaticly.
</span></font></div>
<div><font face="Arial" size="2"></font> </div>
<div><span><font face="Arial" size="2">Thanks for you
answers or suggestions,</font></span></div>
<div><font size="2"><em><br>Gerard Troost<br></em></font><font size="2"><em>SOVON
Dutch Centre for Field Ornithology<br></em></font></div></div>
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