A couple of blog posts I've found on drawing accurate ellipses.
From the old Cennine Products Blog
From Douglas Flynt - I think this one over complicates matters but is worth looking at.
I still haven't found a good source for accurately identifying the correct angle of an upright ellipse away from the horizon line.
This blog is set up to give my students access to information relevant to the content of the classes I teach at UVU and BYU. I will be posting links to blog posts, websites, and news that will be of particular interest to them, as well as digital downloads of my syllabi and in-class handouts. I will also be posting student work and in class demos. The posts can be sorted for relevancy by the labels list on the left side. I've also integrated my Twitter account on the left hand side for quick links that aren't deserving of larger articles.