As cities increasingly entrust their governance to living digital replicas of themselves, the challenge of keeping those replicas truthful becomes a quiet but consequential problem. Researchers have proposed a unified method for merging successive three-dimensional urban surveys—one that treats the familiar failures of boundary confusion and texture mismatching not as separate technical nuisances, but as symptoms of a deeper systemic fragmentation. Tested on a Chinese university campus, the approach achieves meaningful accuracy across semantic, geometric, and visual dimensions, pointing toward