Object Placer With Pinpoint Accuracy

I was wondering since i have an upcoming vacation next week and this year i am planning to sit home and relax, im deciding to update the scenery of the city i live in. Does anyone know of a good scenery maker that can place objects with pinpoint accuracy, i tried rwy12 but i cant seem to get the buildings to within 5 metres of where i want them. What im trying to do is build up the buildings around the airport and eventually into the city itself. Thank you

Edit: I forgot to mention it can be Freeware or Payware 🙂