To Bezier curve first
In my early days of handling lidar data I was getting unacceptable results from smoothing lidar data. A tip from OCAD Inc fixed my issues immediately.
Change the contours to Bezier curve first, then smooth.
Why? Because a better contour curve results from more vertices.
When OCAD first released their ISOM 2017 templates, the colour table was the result of testing on a Xerox Versant digital press.
The 26 June 2018 release of OCAD 2018 saw the colour table, for the ISOM 2017 templates, change to fit with the newly released Appendix 1 of ISOM 2017
Appendix 1 is specified for CMYK offset printing.
Should you be worried?
The new OCAD colours (to ISOM spec) for ISOM 2017 are different from the first release.
Thus you need to be aware that maps from the new ISOM 2017 template might not produce your expected colours in print on a digital press. If you do find an unacceptable difference then you should consider retaining the old template for maps to be produced on a digital press and using the new template only for offset printing.
OCAD now open to Linux users
OCAD runs on Ubuntu using Wine.
For more read ocad.com/blog/2018/05/run-ocad-on-linux