**DSURF****DSURF**, `KCN`

, `XSURF`

, `YSURF`

, `ZSURF`

**Defines the surface upon which digitized nodes lie.**

`KCN`

Surface is located in coordinate system `KCN`

.
`KCN`

may be 0,1,2 or any previously defined local
coordinate system number.

`XSURF`

, `YSURF`

, `ZSURF`

Input one value to define the surface constant. Input 999
in the other two fields. Interpret fields as R, θ, Z for cylindrical
or R, θ, Φ for spherical or toroidal coordinate systems. `XSURF`

and `YSURF`

default
to 999 if `KCN`

= 0.

### Command Default

Surface associated with **DIG** command is the global
Cartesian X-Y plane with Z = 0.

## Notes

Defines the surface upon which the nodes to be digitized (with the **DIG** command)
actually lie. Surfaces are defined by a coordinate system number and a coordinate
constant [**MOVE**]. Two coordinates are determined from the
drawing and converted to surface coordinates. The third coordinate is defined
from the input surface constant. If nodes lie on warped or undefined surfaces,
use the **DMOVE** command.