Native spatial reference system?

[dbetchkal]

I work in Alaska - we are careful about distortions introduced by certain spatial reference systems. I'm wondering which spatial reference that astral uses? Specifically we're using the Astral.solar_elevation() method.

[AndrewCunliffe]

Good question, presumably astral uses the WGS84 coordinate reference system, but it would be nice if that could be confirmed explicitly in the documentation?

(I had thought that WGS83 versus NAD83 were only a few tens of meters apart in Alaska, but perhaps I'm mistaken?)

[sffjunkie]

It is a good question, for which I currently don't have an definitive answer.

The calculations were taken from an Excel spreadsheet by the NOAA and they don't explicitly mention the coordinate reference system they use.

All I can say confidently is the lat/long in the database were taken from Wikipedia which does use WGS84 and I assumed the calculations used the same system.

I will do some research and attempt to find you a better answer.