Nice map, Winston. I wish there were more maps like yours. On a recent search for a course for a new race, I encountered some maps that are, generously, less than perfect. Open Office Draw is completely adequate for most measurers. Nathan and some other measurers have taken O.O.D. maps to a high level. For amateur measurers, this seems to me to a worthwhile program to learn and use, and likely it is the best of them all. I encourage anyone interested to take the time to view Mark's videos and Nathan's.
For those of us who certify course as part of our profession, I think it is worthwhile to use a higher-level program such as Adobe Illustrator or Corel Draw. Take a glance at these beautiful maps by Oscar Wagner and Duane Russell.