ingo@300: TODO:
ingo@300:     * Caching of charts is configured via system property. This should be done
ingo@300:       in another way. (Property: -Dcache.chart)
ingo@300:     * charts for verticalcrosssection and horizontalcrosssection need to be
ingo@300:       implemented
ingo@316:     * distance of tick units in timeseries charts are in form of "dd-MMM". This 
ingo@316:       needs to be adapted depending on range of x-axis.