I've done a cross-section plot of the elevations along our actual route between Eagle and Concepción, and from there to Endeavour, to the end of the proposed route originally posted here.
This corrects the blurry number 1325 to 1395. Vertical scale 1 m/px, horizontal scale 24 m/px:Click to view attachment
Lots of approximations here: Distances are in as-the-crow-flies segments, rather than odometer distances. The proposed map in the abstract contains an error, as pointed out above. The horizontal resolution of the MRO elevation data probably means we can't take the precise topography too seriously. Curvature of the surface of Mars ignored.
Still, it gives us an idea of when we might get a HOAV. It looks to me like most of the roughly level plain just west of Endeavour won't be visible until roughly halfway between Concepción and mini Endurance. Curvature works against us, but the
1.55 m height of pancam works for us.
Remember that the vertical scale is exagerated 24 times here! This is still Meridiani, after all. So any "HOAV" we get will likely be dramatic only thanks to the wonder of Phil-o-vision.