In one embodiment, a method includes accessing a digital map of a real-world region, where the digital map includes one or more three-dimensional meshes corresponding to one or more three-dimensional objects within the real-world region, receiving an object query including an identifier for an anchor in the digital map, positional information relative to the anchor, and information associated with a directional vector, determining a position within the digital map based on the identifier for the anchor and the positional information relative to the anchor, determining a three-dimensional mesh in the digital map that intersects with a projection of the directional vector from the determined position within the digital map, identifying metadata associated with the three-dimensional mesh, and sending the metadata to the second computing device.