mapnik_markers.xml

<Map background-color="#6baed6" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">

  <Style name="world Style">
    <Rule>
      <PolygonSymbolizer fill="#f7f7f7" />
      <LineSymbolizer stroke="#252525" stroke-width="0.1" />
    </Rule>
  </Style>

  <Style name="earthquake Style">
    <Rule>
      <MarkersSymbolizer fill="#ffffb2" opacity=".9"
        width="4" height="4"
        stroke="#636363" stroke-width="1"
        stroke-opacity=".9"
        placement="point" allow-overlap="true"
        marker-type="circle"/>
    </Rule>
  </Style>


  <Layer name="world" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
    <StyleName>world Style</StyleName>
    <Datasource>
      <Parameter name="type">shape</Parameter>
      <Parameter name="file">data/world_borders/TM_WORLD_BORDERS-0.3.shp</Parameter>
    </Datasource>
  </Layer>

  <Layer name="earthquakes" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
    <StyleName>earthquake Style</StyleName>
    <Datasource>
      <Parameter name="type">shape</Parameter>
      <Parameter name="file">data/shp/earthquakes.shp</Parameter>
    </Datasource>
  </Layer>

</Map>