What is a map in SS7?

Could you please elaborate on the concept of a "map" in the context of SS7, the Signaling System No. 7? As an expert in the field of cryptocurrency and finance, I understand that SS7 primarily relates to telecommunications signaling protocols, which may not directly intersect with my area of expertise. However, I'm curious to learn more about how a "map" might be utilized within SS7, and how it could potentially impact the broader telecommunications industry or have any implications for the financial sector, especially given the increasing convergence of technologies and systems. Is it a data structure used for routing or addressing purposes? How does it play a role in facilitating communication between network elements? I'm looking forward to your insights on this topic.