Accuracy is relative to the need. By accurate I mean accurate enough that we can extract actionable information from it. For power plant critical structures we

Accuracy is relative to the need. By accurate I mean accurate enough that we can extract actionable information from it. For power plant critical structures we want 0.5mm, updated every 6months. For forest management we want 5m, updated every 2 years. But this increase in spatial and temporal accuracy will keep on going. At some point in the future a small swarm of insect-sized drones will be able to capture a whole forest in a day for a super low cost. And a few people walking with basic smartphones for will be enough to map a whole city. In 1980 you would have said that google maps 3D and google street view would never exist...