Attempting to convert one layer of this partial image to the base layer of a skin to be applied to a spherical object (probably via Unity) - suggestions accepted for the most efficient way to go about this? Principle notions include
1 - using the coastline layer as the foundational layer to transform
2 - using the lowest layer of sea level differentiation as the foundational layer
3 - complete the layered map (from bottom sea layer to top height-above-sea-level) before consolidating & importing to the spherical object