Which parameters should I specify to simulate how a person at some location sees the sky at a given time? I can't understand why there are 2 dozens of projections, which one do I need? Something that allows the user to change altitude/azimuth of viewing direction.
Which parameters should I specify to simulate how a person at some location sees the sky at a given time? I can't understand why there are 2 dozens of projections, which one do I need? Something that allows the user to change altitude/azimuth of viewing direction.