[OpenLayers-Users] Cluster Strategy and Google Layer

Salvaro asufsc at gmail.com
Tue Nov 4 05:19:29 EST 2008


Hey,

I just added in Map Options the projection EPSG:900913.
The Google layer is with the same parameters, and Vector Layer in options
only receive an array with Fixed and Cluster Strategies.

MapOptions: numZoomLeves=19, projection=EPSG:900913,
displayProjection=EPSG:4326 and the controls.
Vector Layer: strategies=a strategies array.
Google: projection=EPSG:900913, type=GMAPS, Bounds=-20037508.34,
-20037508.34,20037508.34, 20037508.34,
maxResolution=156543.0339F,sphericalMercator=true, units=m.

The problem only happens with Google Layer (as you can see above), in WMS
(EPSG:4326) it works well.

Have no idea about what is happening.

Thanks, Eric!


Eric Lemoine wrote:
> 
> Hi Salvaro. Please show us your new code. Eric
> 
> 2008/11/3, Salvaro <asufsc at gmail.com>:
>>
>> Hi Eric, thanks for your answer!
>>
>> I set in the map this projection, but the problem still continues.
>> If the points are in the correct coordinates (reprojection), the cluster
>> strategy is ignored by the layer.
>> Else if the points are in the incorrect coordinates the cluster aparently
>> works, but obviously all the points are in the center of the map.
>>
>> I tried much things, but really have no idea about what it can be =/.
>>
>> Thanks!
>>
>> Using WMS in EPSG:4326 all works well.
>>
>>
>> Eric Lemoine wrote:
>>>
>>> Hi. The EPSG:900913 projection should be set in the map options. In
>>> this way your vector layer is also a 900913-projected layer. If your
>>> vector points are expressed in 4326 you have to have them re-projected
>>> before the're added to the layer. Eric
>>>
>>> 2008/10/31, Salvaro <asufsc at gmail.com>:
>>>>
>>>> I'm using a Vector Layer with Cluster Strategy (and Fixed) overlaying a
>>>> WMS
>>>> (EPSG:4326) and a Google Layer (EPSG:900913).
>>>>
>>>> In the WMS layer the strategy works perfectly. But in Google Layer, the
>>>> layer apparently ignores the Strategy.
>>>>
>>>> Testing I saw a "strange" thing, when I use the points in EPSG:4326
>>>> coordinates in the Google Layer and all points are in the centre of the
>>>> map,
>>>> looking the opacity is possible to see the points being "clustered".
>>>> But
>>>> when I try to reproject them or just set different coordinates of the
>>>> google
>>>> projection, the layer ignores the cluster.
>>>>
>>>> The points with correct projection:
>>>> http://img225.imageshack.us/my.php?image=correctprojectionyx8.jpg
>>>>
>>>> And with the incorrect projection:
>>>> http://img404.imageshack.us/my.php?image=wrongprojectiontk6.jpg
>>>> http://img505.imageshack.us/my.php?image=wrongprojection2ty8.jpg
>>>>
>>>> I'm using in the Map these attributes: numZoomLevels=19,
>>>> displayProjection=EPSG:4326 and the controls.
>>>> In the layer: type=GMAPS, projection=EPSG:900913,
>>>> maxExtent=-20037508.34,
>>>> -20037508.34, 	20037508.34, 20037508.34, units=m,
>>>> maxResolution=156543.0339F
>>>> and sphericalMercator=true.
>>>>
>>>> The points are being added using addFeatures.
>>>>
>>>>
>>>> Anyone have an idea about what it can be and how can I do the cluster
>>>> works
>>>> with the Google Layer?
>>>>
>>>> Thanks!
>>>> --
>>>> View this message in context:
>>>> http://n2.nabble.com/Cluster-Strategy-and-Google-Layer-tp1402961p1402961.html
>>>> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>>>>
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>>
>> --
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>> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>>
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