What you describe is one of the well known issues of kaXmlOverlay.<br>An alternative overlay solution, with tiling for big images, has been provided by Lorenzo Becchi & Andrea Cappugi (kaOverlay.js and related files).
<br><br>I will release in a short time a new implementatio of kaXmlOverlay using vector graphics (<canvas> or VML) to draw lines and polygons.<br>This isn't the definive solution for your problem, but can help.<br><br>
-Pg<br><br><div><span class="gmail_quote">2006/5/30, Tamas Szekeres <<a href="mailto:szekerest@gmail.com">szekerest@gmail.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi list,<br><br>The current implementation of rendering linestrings and polygons use<br>the drawgeom.php (AFAIK).<br>The size of the generated overlay image highly depends on the current<br>scale of the map. When zooming in the image size may be extremely
<br>large that increases the download time and the memory usage of the<br>browser.<br><br>I think this type of the overlay rendering should be reconsidered so<br>as drawgeom should render only a smaller visible segment of the image
<br>and a new drawing request should be submitted when the user recenters<br>the map outside of that image area.<br><br>Any comments would be appreciated.<br><br>Best Regards,<br><br>Tamas Szekeres<br>_______________________________________________
<br>ka-Map-users mailing list<br><a href="mailto:ka-Map-users@lists.maptools.org">ka-Map-users@lists.maptools.org</a><br><a href="http://lists.maptools.org/mailman/listinfo/ka-map-users">http://lists.maptools.org/mailman/listinfo/ka-map-users
</a><br></blockquote></div><br>