I have Lat/Lon data that is for a sphere, but I am trying to convert these points to an oblate spheroid. Currently the sphere-based data points are offset when projected onto a map that is based on the spheroid geographic coordinate system. I believe this requires a custom datum transform, but it is not included in ArcMap and I have to specify the transform.
Any idea on how to convert latitudes used on a sphere-based geographic coordinate system to one for an oblate spheroid?
The spheroids are for Mars. One is a sphere with radius 3396190, and one is a spheroid with equatorial radius 3396190 and polar radius 3376200. It requires a custom datum transform, but I am unsure how to define such a custom transform. How is this done?