Most projections of the path of totality for the 2017 solar eclipse look like
But there are also maps online using different projections such that the path is a straight line or mostly straight line, as in
I cannot find any CRS for the latter. The ideal CRS for me would produce a straight path (just has to be mostly straight for the part of the path across the US) and in addition the path would be straight up and down with "west" side on the top. I am using QGIS but I am amenable to switching to another open source package if necessary.
@MichaelZeiler said (and I have confirmed) that for this particular eclipse and this part of the run (the US) a standard projection happens to work well enough to produce a satisfyingly straight enough umbral path: EPSG:102003 = USA_Contiguous_Albers_Equal_Area_Conic
+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=37.5 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs
Now I am trying to figure out how to transform that into a CRS that produces maps that are rotated 67.560 degrees clockwise relative to the above.
In other words I want to change the CRS so that I get
Notice how all the labels are horizontal. This is an advantage of changing the CRS as opposed to the Canvas and other solutions - labels just work normally for all new layers. I still don't understand how to change the CRS after reading a number of pages.
Xavier Jubier said that a good approximation of a straight line can also be obtained with EPSG:102009 = North_America_Lambert_Conformal_Conic
+proj=lcc +lat_1=20 +lat_2=60 +lat_0=40 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs
I have learned after many searches that there are obscure projections that will give more exact and general astronomy related solutions and anyone wanting to take this more difficult approach will want to know the keyword quincuncial.