# Combine ReliefPlot with other geographic shapes, like administrative boundaries

How can I combine a ReliefPlot with other geographic shapes? Since the ReliefPlot is just a plain array of values, it is not clear to me how to project it and combine it with other geographic shapes, like administrative boundaries.

For example, I can generate a ReliefPlot of Maine like this:

ReliefPlot[

Use GeoGraphics with GeoStyling.
GeoGraphics[{