A Resource Node is a yellow dot on the minimap that may be harvested for Resources by building a Refinery on the node. Nodes can vary in appearance from map to map, but are usually denoted by a steaming rock-like structure. Nodes can be harvested by instructing a player to move nearby, and the Commander constructing a Refinery over the node. Refineries can also be built if they are within range of any existing structures.
Tip: Harvesting multiple resource nodes at once can allow for greater progression through Research and building