10 ms·

Ok, shame, but thank you for the clarification. Just asking: what are technical constraints of implementing it for any location?

• cpcdoy 1mo ago
  Multiple data layers have to exist per country, and both have to be fetchable straight from the browser, since the site is static with no backend (everything is computed in your browser). 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/ https://eclipse2027times.com/), so by then it should have even more supported countries.