For example it thinks I'm in France (but I'm in the UK), and I will be in Italy (Milan) on the 12th.
Maybe you can manage to fix the city search before the 12th? And enjoy the Eclipse!
Thanks for the feedback!
You need both accurate heights and outlines at ground level for buildings, forest, etc. OSM has outlines nearly everywhere, but height data can be missing. Without a height, it'll be inaccurate to answer "will that roof block the Sun", which is the whole point of the app. France and Spain both publish real heights, so they went first.
You also need good terrain elevation data: with the Sun only a few degrees up, a hill can hide it completely, and your own ground height counts too. Inaccurate terrain data can flatten hilltops for example, which I've seen in many cases.
So, since I want things to be accurate: it's one integration per country, and plenty of countries don't publish heights openly.
I'll be gradually adding more and more countries. I've already started working on the 2027 eclipse (https://eclipse2027times.com/), so by then it should have even more supported countries.