There is a website with information about Vienna.
It includes link to a map (city map) where you can also select to see public transportation etc.
It has some links to sight seeing and other things - a lot of them you will not need.
I thought it might be useful and I provide you with the link:
Vienna information website
And I found a second website - via Vienna for Tourists - and here you have some hints and tips too: Viennainfo
And here is the link to the map where you can select e.g. the address of the venue (Freyung 4):