Recreating Singapore in 3D

Scope of Project: The 3D mapping project encompasses all of Singapore — more than 700 square kilometers.

The Singapore Land Authority (SLA) is engaged in a 3D mapping initiative to create and maintain a high-resolution survey-accurate 3D national map. Denmark and Switzerland have national 3D maps, and Hong Kong has mapped its central business district.

3D virtual environments support city planning, decision-making and risk management. SLA’s project involves capturing vast amounts of data and creating 2D and 3D datasets in several formats. The project began in April 2014 with airborne data capture and modeling; the modeling of buildings is expected to be completed this month. Mobile data capturing and road modeling is expected to be completed by the end of 2016.

The 3D models of buildings and road infrastructure are being created from high-quality images and laser-scanning data. The 3D data is stored in the open information model CityGML, which allows for 3D spatial analysis, simulation and visualization.
The project has employed multiple rapid mapping technologies such as oblique imagery, airborne laser scanning, mobile laser scanning and terrestrial scanning, resulting in more than 500 terabytes of data in multiple formats.

Using Bentley Map software, the project team created, maintained and disseminated 3D information directly from the Oracle Spatial database platflorm. In November, Bentley Systems awarded the 3D mapping project the 2015 Be Inspired Award for Innovation in Government.

Building Level of Detail 2: The Singapore project will model up to LOD2.The five levels of detail (LOD) in CityGML are LoD0 (terrain model), LoD1 (block models with no roof structures), LoD2 (explicit roof structures), LoD3 (detailed architectural models) and LoD4 (interior modeling).