From Halopedia, the Halo wiki
For other uses of "Uplift", see Uplift (disambiguation).
The UNSC Coral Sea eventually encountered a Covenant infantry detachment attempting to tap into one of Delta Halo’s critical power conduits. This energy node was designed to delicately control the direction and movement of the ring as it orbited the gas giant Substance, but the Covenant believed it was also of great religious significance.
Uplift is an island structure similar to Relic. Like most Halo 2 maps, Uplift provides certain landmarks that help players. Two bases are opposite from each other and connected by a large bridge, and there are large structures on either side. The blue base is built inside the cliffs making it an indoor base, while red base is a miniature base sized version of the Library as seen in the campaign.
This map was created for larger scale objective games. It offers access to both infantry and vehicles. By doing this, "the bridge ended up being the infantry route and the terrain below is a vehicle playground". Uplift also has two turrets, "One is facing the bridge sidelong, which could whittle a flag-runner down pretty well as they try to cross it ".
The bases are well set. The blue flag/bomb arming place, in the cliffs, have only two ways to access it, by doorways through either side. The red base is also very similar. The bridge offers the direct route while vehicle ramps offer another way to get up there.