VM Tech support responded this AM and said: What you will need to do is select Tools from the Grid Manager, and select Alter z and description (VM2.0 - 2.1.1) or Alter Meta Data (VM 2.5). Then you can change the z units to either meters or feet. This will not change the values accordingly, however. If you wish to change the values, you will need to use the Grid Calculator from the Analysis button on the Grid Manager, and with your grid selected that needs to be converted to either meters or feet, simply use the calculator to multiply it by either 0.3048xx or by 3.2xx depending which way you're converting (I can't remember the actual formulae). The equation will look something like this: Grid1*0.3048 You will then be able to splice the grids. You will still need to ensure that the z units are the same in order to splice them. Thanks for your replies and Happy New Year! Matt Fowler Solid Earth, Inc., Real Estate Information Systems http://www.solidearth.com ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]