Here's the map of World of Darkness cosmology.
The Earth is also Gaia, the Mother Goddess of all living things. She is not limited to Earth; all living parts of creation collectively form Gaia whether they are within the physical world or not.
The Umbra, also known as the Spirit World, the Shadow, or the Velvet Shadow, constitutes a realm that exists alongside, yet separate from, the material world. The term "Umbra" is commonly employed, particularly by werewolves, to specifically refer to the "Spirit Wilds" or Middle Umbra. Nevertheless, Umbral cosmology encompasses more than just this aspect. Some groups, such as the Void Engineers, perceive the Umbra as an alternate or parallel dimension, universe, or reality, despite technically occupying the same physical space as Earth.
The material world, also known to Garou as the Gaia Realm and to wraiths as the Skinlands, represents the world of everyday life with which all humans, vampires, mages, hunters, and werewolves are intimately familiar.
There are three Umbras, collectively known as the Near Umbra. Within the Near Umbra, these three Umbras are called the High, Middle, and Low Umbra, each infinitely vast in scope. However, despite their immense expanse, they are all encompassed "within" Earth, with the system's boundary being Earth's atmosphere.
There are 13 realms called the Thirteen Near Realms. The realms are The Abyss, The Aetherial Realm, The Arcadia Gateway, The Atrocity Realm, The Battleground, The CyberRealm, Erebus, Flux, The Legendary Realm, Pangaea, Scar, Summer Country and Wolfhome.
Brief summary of the three Umbras.
The Gauntlet, also known as the Wall in the Middle Kingdom, acts as the barrier surrounding material reality, separating it from the Umbra. Over the centuries and varying from location to location, the Gauntlet experiences fluctuations. Still, the last 200 years have strengthened this spiritual barrier, likely due to the increasing influence of the Technocratic paradigm.
Different Umbrae possess distinct Gauntlets, which typically overlap or may even be the same. The Gauntlet in the Dark Umbra is called the Shroud, while the Middle and High Umbra employ the term "Gauntlets" to describe theirs. To separate the Umbrae of Earth from the Far Umbra, a Gauntlet-like phenomenon known as the Horizon comes into play.
Here is the relation between the Earth and the Gauntlet.
Near Umbra layout.