CalTa Releases New Features for Digital Twin Platform 'TRANCITY Nebula'

CalTa Corporation (headquartered in Minato-ku, Tokyo; CEO: Hideyuki Furabayashi; hereinafter "CalTa"), which promotes digital transformation (DX) in the infrastructure and construction industries through the development and provision of the digital twin platform "TRANCITY," has released new features for its digital twin platform "TRANCITY Nebula" on June 15, 2026.

This update significantly enhances the "survey coordinate display function" to enable rapid verification of the alignment between design drawings and actual construction locations—a critical requirement on-site. Additionally, CalTa has implemented the "expanded pin function (supporting video and image display)" to streamline information sharing, and the "time and weather function" to facilitate easier confirmation of weather conditions, thereby improving on-site productivity and strengthening risk management.

※ The new features have been automatically applied to all customer environments since June 15, 2026.

1. New Survey Coordinate Display Function

Overview: A new feature has been added that allows users to easily register survey coordinates (such as survey points or reference positions of structures) with simple click operations within the TRANCITY Nebula interface. Additionally, multiple registered coordinate data can now be downloaded in bulk in CSV format.

Benefits: This function seamlessly integrates with "automatic generation of point cloud and 3D models from video," "upload and overlay display of BIM/CIM models," and the "self-positioning function" using tablets or other devices, delivering the following benefits across various construction phases.

### Pre-construction: Confirming Planned Structure Locations On-site

By combining pre-registered survey coordinates with the "upload and overlay display of BIM/CIM models" and the "self-positioning function," site managers can stand at the planned construction site with a tablet and visually verify whether the design data displayed on-screen aligns with the actual on-site location (layout and marking positions). This enables early detection of layout inconsistencies or errors that might be overlooked in numerical data alone, preventing critical rework risks before construction begins.

### During construction: Monitoring As-built Conditions and Positional Accuracy

During construction, daily changes in site conditions can be captured by recording and uploading videos using smartphones or other devices, automatically generating point cloud and 3D models. By overlaying these with the "self-positioning function" and registered coordinates, it becomes possible to manage and verify the position of structures under construction against design values in real time and in an intuitive manner.

2. Expanded Pin Function (Support for Video and Image Display)

Overview: Previously, the pin function only allowed placing icons in 3D space. With this expansion, videos and images can now be directly assigned to pins, enabling them to be visually placed and displayed directly within the 3D space. Furthermore, if location data is embedded in media captured by smartphones or drones, the system automatically reads the latitude and longitude and plots the data at the correct position.

Benefits: Previously, users had to click on each pin to open and view stored images or videos. Now, with videos and images themselves visible as pins in space, site conditions can be intuitively grasped, reviewed, and shared at a glance without the need to open each pin. Automatic plotting of pin locations significantly reduces the manual effort required to map site photos onto maps one by one, facilitating rapid situation sharing and decision-making with remote stakeholders.

3. New Time and Weather Function

Overview: A new function has been added that allows users to change the displayed time and weather conditions (such as rain or snow) on the map by clicking the "Time & Weather" icon located at the center of the view screen.

Benefits: Users can now simulate and observe, directly on-screen from within the office, the impact of real-world weather conditions such as rain or snow on the point cloud and 3D models viewed in TRANCITY Nebula, as well as visibility differences across different times of day. This supports prior assessment of impacts and the planning of safety measures under diverse weather scenarios.

4. Additional Enhancements and Improvements

To improve usability and operational efficiency, the following UI/UX improvements have been implemented:

- Improved operability during continuous dimension measurement: Users can now "step back" incrementally through right-click operations. - Fine adjustment of dimension placement: The measurement management screen now allows users to change and fine-tune the position of dimensions after they have been placed. - Addition of user detail settings screen: Users can now customize settings such as measurement units and default map display on a per-user basis.

■ Future Outlook

CalTa aims to lead the integration of the physical (real) and digital worlds through cutting-edge digital twin technology, contributing to the sustainable development of the infrastructure and construction industries. TRANCITY Nebula will continue to undergo phased and continuous development as a platform designed to meet the increasingly diverse needs of construction sites.

The company will continue striving to enhance its services further, advancing the utilization of digital twins and 3D data to contribute to industry-wide DX and the realization of safe and efficient site management.