This hints at a hiking trip planner maybe? Depending on time of day and year evaluate a path to be in the direct sun/shade?

In summer, I might want to avoid the direct sun. Suggest the hiking path with least direct sunshine. And if it is autumn already, then please suggest a hiking path to be in the sun all day.

Might be a cool feature to compare hiking paths by percentage of direct sunshine.

But maybe, selecting a path through a forest vs. across open fields might already do.