[mapserver-users] Boundary overlay shift

[Varun saraf]

Hello,

I have been using Mapserver with Tilecache and Google maps to display
polygon boundary overlays for some time now. However, the users
complain that the overlay is not accurate if they zoom in to the map
(zoom level 14 onwards). Is this a problem with the projection scheme
being used? I think my data is in epsg 4326 format. What projection
scheme does google maps use? Its strange that everything looks fine at
the higher levels but when I zoom in beyond level 13, the boundary
gets misaligned though the shape of the boundaries is accurate. Has
anyone solved this problem? If yes, it would be great if you can point
me in the correct direction.

BTW, I use ms4w for windows and the GtileOverlay method with tilecache
to render the boundary overlays.

Thanks,
Varun