This is great! It’s been on my hacking project list for a couple years now. Glad to see it go. :)
I hike a lot. Figuring out exactly where & when sunset will hit is next to impossible in mountainous terrain.
Feature request, if you’ll entertain one: instead of a 1-bit sun vs shade, show a heatmap of sun angle. Think “interactive golden hour map” for photographers.
Nice! Was thinking it'd be cool to have a little tool that calculates the height of an object (tree, building, etc) given the length of its shadow and the time of day (GPS coords might also be necessary).
Seems like you've already performed most of the necessary calculations here.
Today’s sunset around Puget Sound: https://shademap.app/#47.89056,-122.66785,7z,1635813675213t