/**
* Gets a copy of the instance, copying output data to the input slots.
* Specifically advance() will make a copy and move the source's output
* spatial reference to be the new object's input spatial reference.
*
* @return A new FilterEnv
*/
public FilterEnv advance()
{
FilterEnv a = clone();
a.setInputSRS(getOutputSRS());
a.setOutputSRS(getOutputSRS());
return(a);
}
