Figure 2.
Illustration of the defined coordinate systems, (a) the local Cartesian coordinates coordinate system, (b) the device coordinate system, (c) the user coordinate system.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.