[Qgis-user] ugly results with new symbology: how to improve them?

[Paolo Cavallini]

Hi all.
I have defined a line decoration (see style below).
For straight lines it looks nice, but in normal situations it is ugly:
https://int.faunalia.it/~paolo/strade.png
Anyone knows how to improve it?
All the best.
===
<!DOCTYPE qgis PUBLIC 'http://mrcc.com/qgis.dtd' 'SYSTEM'>
<qgis version="1.8.0-Trunk" minimumScale="0" maximumScale="1e+08"
hasScaleBasedVisibilityFlag="0">
  <transparencyLevelInt>255</transparencyLevelInt>
  <renderer-v2 symbollevels="0" type="singleSymbol">
    <symbols>
      <symbol outputUnit="MM" alpha="1" type="line" name="0">
        <layer pass="0" class="SimpleLine" locked="0">
          <prop k="capstyle" v="square"/>
          <prop k="color" v="166,166,166,255"/>
          <prop k="customdash" v="5;2"/>
          <prop k="joinstyle" v="bevel"/>
          <prop k="offset" v="0"/>
          <prop k="penstyle" v="solid"/>
          <prop k="use_custom_dash" v="0"/>
          <prop k="width" v="6.26"/>
        </layer>
        <layer pass="0" class="SimpleLine" locked="0">
          <prop k="capstyle" v="square"/>
          <prop k="color" v="255,255,255,255"/>
          <prop k="customdash" v="5;2"/>
          <prop k="joinstyle" v="bevel"/>
          <prop k="offset" v="0"/>
          <prop k="penstyle" v="dash"/>
          <prop k="use_custom_dash" v="0"/>
          <prop k="width" v="0.26"/>
        </layer>
        <layer pass="0" class="SimpleLine" locked="0">
          <prop k="capstyle" v="square"/>
          <prop k="color" v="255,255,0,255"/>
          <prop k="customdash" v="5;2"/>
          <prop k="joinstyle" v="bevel"/>
          <prop k="offset" v="2"/>
          <prop k="penstyle" v="solid"/>
          <prop k="use_custom_dash" v="0"/>
          <prop k="width" v="0.26"/>
        </layer>
        <layer pass="0" class="SimpleLine" locked="0">
          <prop k="capstyle" v="round"/>
          <prop k="color" v="255,255,0,255"/>
          <prop k="customdash" v="5;2"/>
          <prop k="joinstyle" v="bevel"/>
          <prop k="offset" v="-2"/>
          <prop k="penstyle" v="solid"/>
          <prop k="use_custom_dash" v="0"/>
          <prop k="width" v="0.26"/>
        </layer>
      </symbol>
    </symbols>
    <rotation field=""/>
    <sizescale field=""/>
  </renderer-v2>
  <customproperties/>
  <displayfield>FNODE_</displayfield>
  <label>0</label>
  <labelattributes>
    <label fieldname="" text="Etichetta"/>
    <family fieldname="" name="Sans"/>
    <size fieldname="" units="pt" value="12"/>
    <bold fieldname="" on="0"/>
    <italic fieldname="" on="0"/>
    <underline fieldname="" on="0"/>
    <strikeout fieldname="" on="0"/>
    <color fieldname="" red="0" blue="0" green="0"/>
    <x fieldname=""/>
    <y fieldname=""/>
    <offset x="0" y="0" units="pt" yfieldname="" xfieldname=""/>
    <angle fieldname="" value="0" auto="0"/>
    <alignment fieldname="" value="center"/>
    <buffercolor fieldname="" red="255" blue="255" green="255"/>
    <buffersize fieldname="" units="pt" value="1"/>
    <bufferenabled fieldname="" on=""/>
    <multilineenabled fieldname="" on=""/>
    <selectedonly on=""/>
  </labelattributes>
  <edittypes>
    <edittype type="0" name="CODICE"/>
    <edittype type="0" name="CODIFICA"/>
    <edittype type="0" name="FNODE_"/>
    <edittype type="0" name="LENGTH"/>
    <edittype type="0" name="LPOLY_"/>
    <edittype type="0" name="NOME"/>
    <edittype type="0" name="RPOLY_"/>
    <edittype type="0" name="STATALI_"/>
    <edittype type="0" name="STATALI_ID"/>
    <edittype type="0" name="TIPO"/>
    <edittype type="0" name="TNODE_"/>
  </edittypes>
  <editform></editform>
  <editforminit></editforminit>
  <annotationform></annotationform>
  <attributeactions/>
  <overlay display="false" type="diagram">
    <renderer item_interpretation="linear">
      <diagramitem size="0" value="0"/>
      <diagramitem size="0" value="0"/>
    </renderer>
    <factory sizeUnits="MM" type="Pie">
      <wellknownname>Pie</wellknownname>
      <classificationfield>0</classificationfield>
    </factory>
    <scalingAttribute>0</scalingAttribute>
  </overlay>
</qgis>
-- 
Paolo Cavallini: http://www.faunalia.it/pc