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I think the parent post was asking if you could swap out the default sphere for another. Like, Mars. That way this could be used for geo queries on any planet.
by jonesetc 11y ago
I think the parent post was asking if you could swap out the default sphere for another. Like, Mars. That way this could be used for geo queries on any planet.
Or is it just assuming that the earth is a perfect sphere?
- dmit 11y agoThe latter. Very few people need precise geolocation on Mars or any other non-Earth planet. But planets are not perfect spheres (mainly due to rotation), so treating them as such introduces errors. If you're curious about the topic, you can start here: https://en.wikipedia.org/wiki/World_Geodetic_System https://en.wikipedia.org/wiki/World_Geodetic_System.