I know theres a list posted from beta with text only.. and I take no credit for this link, I found it extremely helpful and i'm sure you will too!
SWTOR Datacrons – Complete List With Screenshot Guides | Datacron locations in Star Wars: The Old Republic
Alot of the planets have multiple screen shots of where to start, and step by step insctructions, as well as a video at the end with all of them as well. Not all planets have the screenshots and videos, but they still have the coordinates and a brief description.