Surveyors, land-use engineers, and architects often need to createcontours that show the elevation of land. You can easily do this usingthe SPLINE command.

First, set an easily visible point style. Choose Format > Point to do this. (This is the PDMODE system variable.)

Thenuse the POINT command to insert the points into the drawing. If youhave a list of points in an external file, you can create a script filethat sets PDMODE, starts the POINT command, and inserts all the points.You'll need to strip the external file of everything except the pointsand then format them (in a text-only file) so that each one is on aseparate line.

Finally, use the SPLINE command. Use the NODE osnap variable to snap to the points.