OK, I must be a nerd. This stuff is fun. We learned about the shape of the geoid, Earth, and its measurment relative to the ellipsoid. There are several geographic coordinate systems used to develop Datums, or networks of known points on the Earth. The big lesson from this chapter is Know your projection! If you include layers in ArcMap that have undefined coordinate systems, the features will not line up properly.
I would love to learn how create datum points by Astronomical Observation. Pete, do you have a text for that?
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment