PointSymbolizer Aggregation

Hello all,

I have a problem with a representation of my points. My points seems to
be aggregated at larger scale. I can see only one feature where several
feature exists.

My layer :
<Layer name="port" srs="+init=epsg:4326" status="on">
    <StyleName>style_node_port</StyleName>
    <Datasource>
         <Parameter name="type">postgis</Parameter>
         <Parameter name="host">&db_host;</Parameter>
         <Parameter name="port">&db_port;</Parameter>
         <Parameter name="user">&db_user;</Parameter>
         <Parameter name="password">&db_password;</Parameter>
         <Parameter name="dbname">&db_name;</Parameter>
         <Parameter name="table">(select * from node where type = 1) as
node</Parameter>
         <Parameter name="estimate_extent">false</Parameter>
         <Parameter name="extent">-180,-90,180,90</Parameter>
         <Parameter name="encoding">utf8</Parameter>
    </Datasource>
</Layer>
<Style name="style_node_port">
    <Rule>
       <Filter>[type] = 1</Filter>
       <PointSymbolizer file="&image_dir;/port.png" width="16"
height="16" type="png"></PointSymbolizer>
    </Rule>
</Style>

My result:
only 2 points / 6 => Capture-1.png
all points => Capture-2.png

If someone has an idea ?

Alexandre



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