I am calculating areas of polygons and distances between points in a small park in South Australia (~ 139.4 longitude, -34.3 latitude). All of these points are currently in GCS WGS 1984, and the polygons are all less than 1 square kilometer.
I am trying to determine the best projected coordinate system for these calculations, and I have come upon multiple options. I read that, for small local areas of the Australian continent, MGA is an ideal projection, so I am considering using GDA 1994 MGA Zone 54. However, I've also read that for area calculations, it is best to use an equal area projection, so I have also considered using GDA 1994 Australia Albers.