4D CITY is a surveying and mapping technology company focused on helping local surveyors strengthen their business capabilities through advanced technical support and innovative solutions. Founded by industry experts, the company specializes in photogrammetry and 3D modeling, with its first offering centered on Feature & Level Surveys.

For these projects, 4D CITY has developed a drone-based oblique photogrammetry system that integrates artificial intelligence and multiple algorithms to support efficient operations and accurate measurements. Its production workflow covers drone aerial photography, 3D modeling, and 3D measurement, combining aerial photogrammetry with methods and data from total stations and GPS. The company has established production processes and output standards for integrated 2D and 3D survey work.

4D CITY also draws on an overseas surveying and mapping data production team with more than 20 years of experience. The team provides project management and production capabilities to help deliver client assignments to a high standard and on schedule.