I think this is possible using SLD (styles) for displaying or not some graphics in WMS.<br><br>We´ve done examples of doing this for the "Presas" layer in this URL: <a href="http://www.mirame.chduero.es/DMADuero_09_Viewer">http://www.mirame.chduero.es/DMADuero_09_Viewer</a>. To open the layerSwitcher click on the big white arrow at the upper-right corner in the screen.<br>
<br>Here is the part of the sld (<a href="http://www.mirame.chduero.es/DMADuero_09_Viewer/wise.xml">http://www.mirame.chduero.es/DMADuero_09_Viewer/wise.xml</a>) that shows or not a graphic depending the scale (zoom).<br>
<br><br><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote"><sld:NamedLayer><br><sld:Name>Presas</sld:Name><br><sld:UserStyle><br>
<sld:Name>Style1</sld:Name><br><br><sld:FeatureTypeStyle><br><sld:FeatureTypeName>Presas</sld:FeatureTypeName><br><sld:Rule><br><sld:Name/><br><sld:Title> </sld:Title><br>
<sld:MaxScaleDenominator>1000000</sld:MaxScaleDenominator><br><sld:PointSymbolizer><br><sld:Graphic><br><sld:ExternalGraphic><br><sld:OnlineResource xlink:href="<a href="http://www.mirame.chduero.es/DMADuero_09_Viewer/img/sld/dam.gif">http://www.mirame.chduero.es/DMADuero_09_Viewer/img/sld/dam.gif</a>"/><br>
<sld:Format>image/gif</sld:Format><br></sld:ExternalGraphic><br><sld:Size>1</sld:Size><br><sld:Opacity>1</sld:Opacity><br></sld:Graphic><br></sld:PointSymbolizer><br></sld:Rule><br>
<sld:Rule><br><sld:Name/><br><sld:Title> </sld:Title><br><sld:MinScaleDenominator>1000000</sld:MinScaleDenominator><br><sld:PointSymbolizer><br><sld:Graphic><br><sld:Mark><br>
<sld:WellKnownName>triangle</sld:WellKnownName><br><sld:Fill><br><sld:CssParameter name="fill">#555555</sld:CssParameter><br><sld:CssParameter name="fill-opacity">1.0</sld:CssParameter><br>
</sld:Fill><br></sld:Mark><br><sld:Size>11</sld:Size><br><sld:Rotation>0</sld:Rotation><br></sld:Graphic><br></sld:PointSymbolizer><br></sld:Rule><br></sld:FeatureTypeStyle><br>
</sld:UserStyle><br></sld:NamedLayer><br></blockquote><br><br><div class="gmail_quote">2008/6/23 Darko Radiceski <<a href="mailto:radiceski@gmail.com">radiceski@gmail.com</a>>:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>Dear all,</div>
<div> </div>
<div>I have a raster that contains millions of point published through Arc IMS in a WMS service. I am trying to design a way to limit the number of points that get displayed based on the map zoom level. I have numbered the levels on the database side.</div>
<div> </div>
<div>Is it possible to somehow in the WMS call for Open Layers to include the zoom level that would be used at the Arc IMS side to select the wanted features?<br clear="all"></div>
<div> </div>
<div>Cheers</div>
<div>Dan<br><font color="#888888">-- <br>Radiceski Dan<br>University of Wollongong<br>Australia<br>SIFE - UOW Chapter - Alumni<br>CASUAL ACADEMIC STAFF TEACHING - UOW SITACS<br>(School of Information Technology and Computer Science,University of Wollongong)<br>
Univeristy of Wollongong - Alumni </font></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Un saludo,<br><br>Juan Gonzalez del Pino<br>