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

[Alessandro Ferrucci]

I am trying to verify that I don't see this behavior with google maps
v2.  I switched the google maps script to specify v=2 but I still get
the delayed tile dragging.

On Sun, Jul 24, 2011 at 3:56 PM, Alessandro Ferrucci
<alessandroferrucci at gmail.com> wrote:
> 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
>



-- 
Signed,
Alessandro Ferrucci