Photoshop :: Measurement In CC - Extended?

In some of the Photoshop "Extended" versions, there was a function in which one could apply a known measurment to an image and then determine other dimensions in the image. For example, if one were designing a sign for a building and shot a picture of the building with a known 5' doorway, one could use the measure tool (or whatever it was called in that function) to tell Photoshop that the doorway was 5'-0" wide.

From there, after you laid in the sign design, and used the measure tool on the sign image, Photoshop would tell you the dimensions of the sign based on the scale you set with the doorway. Now for the big question: One, does that function still exist, and two, if so, where do you find it?