Surely you don't need the phone's actual latitude and longitude. I can't imagine that the direction to a point infinitely (basically) far away will be different depending on where on this tiny planet you're standing. I'm sure just using the Earth's position (or any other position in our solar system?) would be sufficient to get a valid pointing vector.
exactly this. GP hasn't internalized what it means to have a non-geocentric mental model of the galaxy. we are but a speck on an arm on a not-particularly significant little cluster of fireballs
An analogy would be the centre circle of a soccer field. Walk around it but always face outwards. Now as you do that point to a city 100 miles away. Insignificant circle but…
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Surely you don't need the phone's actual latitude and longitude. I can't imagine that the direction to a point infinitely (basically) far away will be different depending on where on this tiny planet you're standing. I'm sure just using the Earth's position (or any other position in our solar system?) would be sufficient to get a valid pointing vector.
I think you still need to know where the phone is located on Earth to compute the normal vector (i.e. where is up ?)
exactly this. GP hasn't internalized what it means to have a non-geocentric mental model of the galaxy. we are but a speck on an arm on a not-particularly significant little cluster of fireballs
An analogy would be the centre circle of a soccer field. Walk around it but always face outwards. Now as you do that point to a city 100 miles away. Insignificant circle but…
That's it exactly. You need the lat/long, time+date, and device orientation in order to float the arrow