I have some Nad83 data that I want to overlay on Google Maps. This article by ngs.noaa.gov explains translating from nad83 to wgs84 better than anything I have read. If I were to use a tool like the noaa transformation tool to convert a coordinate pair from NAD83 to WGS84 for this purpose, would I want to use an output epoch that matches the approximate date of the imagery? Or is all google imagery georeferenced based on some common epoch independent of the date the imagery was created?
I realize that this datum shift will be small and probably hard to realize on the +/- 1 meter Google photography. But still, I want to make sure I get the best alignment possible.