AutoCAD 2008 User's
Guide > Create and Modify
Objects > Use Precision
Tools > Use Coordinates and
Coordinate Systems (UCS) >

Overview of Coordinate Entry

*X,Y*) or polar
coordinates.

Cartesian and Polar Coordinates

*X*,
*Y*, and *Z*. When you
enter coordinate values, you indicate a point's distance (in units)
and its direction (+ or -) along the *X*,
*Y*, and *Z* axes relative
to the coordinate system origin (0,0,0).

*XY* plane, also called
the *workplane*. The workplane is similar to a
flat sheet of grid paper. The *X* value of a
Cartesian coordinate specifies horizontal distance, and the
*Y* value specifies vertical distance. The
origin point (0,0) indicates where the two axes intersect.

Polar coordinates use a distance and an angle to locate a point. With both Cartesian and polar coordinates, you can enter absolute coordinates based on the origin (0,0), or relative coordinates based on the last point specified.

Another method of entering a relative coordinate is by moving the cursor to specify a direction and then entering a distance directly. This method is called direct distance entry.

You can enter coordinates in scientific, decimal, engineering, architectural, or fractional notation. You can enter angles in grads, radians, surveyor's units, or degrees, minutes, and seconds. The UNITS command controls unit format.

Display Coordinates on the Status Bar

The current cursor location is displayed as a coordinate value on the status bar.

There are three types of coordinate display: static, dynamic, and distance and angle.

*Static display*. Updates only when you specify a point.*Dynamic display.*Updates as you move the cursor.*Distance and angle display.*Updates the relative distance*(distance<angle)*as you move the cursor. This option is available only when you draw lines or other objects that prompt for more than one point.