[galaxy-user] Assemble a consensus genome from NGS data

Hi, Does anyone know how to get a consensus genome from NGS data indicating the percent variance at each nucleotide? I have a small virus genome with manyfold coverage from my transcriptomic run. I'd like to know what the transcriptome indicates is the actual genome plus get a feel for any hotspots where there appears to be significant varience from the reference sequence (i.e. because the reference is wrong or perhaps because of frequent errors in that region due to RNA pol II having a problem accurately transcribing the sequence). Many thanks! David