Working with coordinates

For accuracy in a drawing, you can locate specific points by entering coordinates as you draw or modify entities. When you create two-dimensional entities, you enter two-dimensional coordinates; for three-dimensional entities, you specify three-dimensional coordinates.

You can also specify coordinates in relation to other known locations or entities in a drawing. In particular, when you work in three-dimensional drawings, it is often easier to specify coordinates in relation to a two-dimensional working plane, called a user coordinate system (UCS).

This section explains how to work with coordinates, including how to:

• Use two-dimensional and three-dimensional coordinate systems.
• Specify absolute and relative coordinates.
• Specify polar, spherical, and cylindrical coordinates.
• Define and manipulate user coordinate systems.

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Defining user coordinate systems

Using Cartesian coordinates

Using three-dimensional coordinates

Using two-dimensional coordinates

Using xyz point filters

How do I...

Define a UCS by specifying a new origin and points on the positive x- and y-axes

Find the coordinate of a point in the drawing

Select a preset UCS