Introducing a New and Intuitive Smart Land Administration Experience: Taichung's '158PLUS Spatial Information Network' Upgraded with High-Precision 3D Mapping Data

Following the formal signing of a surveying collaboration agreement between Taichung City Government's Land Administration Bureau and the Ministry of the Interior's National Land Surveying and Mapping Center, the latter has provided the outcomes of the 'Procurement Project for Production of Multi-Dimensional Spatial Basic Map Data in 2023 and 2024' within Taichung City's jurisdiction. These include seven types of map data products: 1:1,000 topographic maps, 1:1,000 ortho-rectified imagery, and 3D mesh models of real-scene imagery, among others. The Land Administration Bureau has already integrated these datasets into the '158PLUS Spatial Information Network' for public online access and has further innovated by launching a value-added '3D Real-Scene Cadastral Map,' enabling citizens to enjoy a new, intuitive smart land administration experience by 'viewing and querying anywhere' within a realistic 3D city model.

The Land Administration Bureau explained that in recent years, the Ministry of the Interior's National Land Surveying and Mapping Center has utilized aerial surveying technology to build high-precision 3D mesh models that accurately depict urban buildings and street scenes. However, due to the lack of attribute data in these models, they were previously limited to visual browsing without query functionality. To overcome this limitation, the Land Administration Bureau has precisely linked the 3D mesh models with building survey results, assigning complete land administration information to each building, thereby successfully creating an interactive '3D Real-Scene Cadastral Map.' With this technology, citizens need only click on a target building within the 3D city model for the system to instantly locate it and display the building's survey results and related cadastral information, helping users quickly understand the building's location, spatial relationships, and surrounding environment, significantly improving query efficiency and user experience.

The platform integrates rich 'Actual Transaction Price Registration' data, combining it with cadastral maps and urban planning maps to overlay a 3D spatial map for transaction price inquiries that includes 3D building models. Price information is presented in an intuitive 3D graphical format, allowing users to objectively assess market trends by combining it with surrounding environmental data, providing a solid foundation for home-buying decisions and asset planning. Citizens can now enjoy lifelike 3D cityscape query services online without leaving home. In the future, this system can be widely applied in urban planning, building management, disaster response, and public facility management.

Going forward, the Land Administration Bureau will continue to maintain close cooperation with the Ministry of the Interior's National Land Surveying and Mapping Center, integrating centrally produced high-precision 3D surveying outcomes with local innovative service platforms to deepen the functionality of the '158PLUS Spatial Information Network' and build a comprehensive smart land administration platform. This will bring vast surveying data into everyday life, maximize public value, lead Taichung City toward the smart governance goals of a smart city, and establish a new benchmark for smart land administration and citizen-friendly services.

The Land Administration Bureau further explained the steps for accessing map data on the '158PLUS Spatial Information Network':

1. Access the Taichung City 158PLUS Spatial Map Platform (https://lohas.taichung.gov.tw/lohas/) 2. Click 'Confirm and Enable Advanced Mode' 3. Click the 3D icon on the left side of the screen, enable the '3D Stereo Map Platform,' and adjust the map scale to <5000 4. Click the 'Layers' icon on the right, select '3D Building Model,' and check the box to view 3D building models 5. Additionally, click the 'Layers' icon, select 'More Basic Maps' → '1/1000 Topographic Map (Surveying Center)' to view the 1:1,000 topographic map and ortho-rectified imagery.