An **AutoCAD coordinate system** is a reference framework used to specify the precise location of points, lines, and objects within a drawing.

**Usage**: It defines the X, Y, and sometimes Z (for 3D) axes, allowing you to accurately position and measure objects within your drawing.

**Examples of Use**:

**Drawing Placement**: Use the coordinate system to specify the exact location of objects on a drawing, such as architectural floor plans.**Geospatial Mapping**: In GIS applications, AutoCAD uses geographic coordinates (latitude and longitude) to place objects accurately on Earth’s surface.**3D Modeling**: For 3D modeling, the coordinate system helps define the position of objects in three-dimensional space.

Understanding and using the AutoCAD coordinate system is fundamental for precise drafting and modeling in AutoCAD.