[OpenLayers-Users] Re: WMS over Google Maps when panning tiles not in synch

[Alessandro Ferrucci]

I am experiencing the exact same of what this ticket says:

http://trac.osgeo.org/openlayers/ticket/2929

does this mean that currently it's an issue in google maps v3?

Thanks,
Alessandro Ferrucci

On Sun, Jul 24, 2011 at 3:50 PM, Alessandro Ferrucci
<alessandroferrucci at gmail.com> wrote:
> Hello,
> I have the following code
>
>       var map;
>            var projectionWGS84 = new OpenLayers.Projection("EPSG:4326");
>            var projectionMercator = new OpenLayers.Projection("EPSG:900913");
>            // Avoid pink error tiles
>            OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
>            OpenLayers.Util.onImageLoadErrorColor = "transparent";
>
>            function init(){
>                var options = {
>                    projection: new OpenLayers.Projection("EPSG:900913"),
>                    displayProjection: new OpenLayers.Projection("EPSG:4326"),
>                    units: "m",
>                    maxResolution: 156543.0339,
>                    maxExtent: new OpenLayers.Bounds(-20037508,
> -20037508,20037508, 20037508),
>                    restrictedExtent: new
> OpenLayers.Bounds(-164.88281,5.09094,-41.39648,52.69636).transform(projectionWGS84,projectionMercator),
>                    controls:[
>                        new OpenLayers.Control.Navigation(),
>                        new OpenLayers.Control.ArgParser(),
>                        new OpenLayers.Control.Attribution(),
>                        new OpenLayers.Control.PanZoomBar({ position:
> new OpenLayers.Pixel(2, 15) }),
>                        new OpenLayers.Control.Scale($('scale')),
>                        new OpenLayers.Control.LayerSwitcher(),
>                        new OpenLayers.Control.MousePosition(),
>                        new OpenLayers.Control.Permalink()
>                    ]
>                };
>                map = new OpenLayers.Map('map',options);
>                var googleHibridLayer = new OpenLayers.Layer.Google(
> "Google Hibrid", {type: google.maps.MapTypeId.HYBRID,
> 'sphericalMercator': true,isBaseLayer: true } );
>                var googleStreetLayer = new OpenLayers.Layer.Google(
> "Google Street", {'sphericalMercator':true} );
>                var addressLayer = new OpenLayers.Layer.WMS(
>                "Addresses", "<WMS SERVER HOSTNAME>",
>                {
>                    LAYERS: 'cira:address',
>                    STYLES: '',
>                    format: 'image/png',
>                    tiled: true,
>                    transparent:true,
>                    tilesOrigin : map.maxExtent.left + ',' +
> map.maxExtent.bottom
>                },
>                {
>                    buffer: 10,
>                    displayOutsideMaxExtent: true,
>                    isBaseLayer: false
>                }
>            );
>
> map.addLayers([googleStreetLayer,googleHibridLayer,addressLayer]);
>                var USABounds=new
> OpenLayers.Bounds(-124.731,24.956,-66.97,49.372);
>                USABounds.transform(projectionWGS84,map.getProjectionObject());
>                map.zoomToExtent(USABounds);
>            }
>
> The WMS looks to be overlaying fine, but when I pan the map the tiles
> look like they are "shifting plates" meaning they look like they are
> moving independently and it looks quite ugly.
>
> I have tried adding "projection: new
> OpenLayers.Projection("EPSG:900913")," as an option to the WMS layer
> itself thinking maybe that would fix it but it did not.
>
> I'm using stable Openlayers 2.10
> Any ideas?
>
> Thank you,
> --
> Signed,
> Alessandro Ferrucci
>



-- 
Signed,
Alessandro Ferrucci