The importance of LiDAR in the construction of new basic surveying and mapping

Aug 07, 2023

From the current progress and results of the new basic surveying and mapping construction pilot projects in Shanghai and Wuhan, three-dimensional laser technology, as a new surveying and mapping technology, has become an indispensable acquisition technology and data source in the construction of pilot projects.

The core point of the new basic surveying and mapping is to expand the construction system of geographical entities, expand the geographical elements and their attributes, break the unified scale frame, achieve a high-precision acquisition of an entity only once, and realize the goal of "above-ground integration", "water-land integration" and "indoor and outdoor integration" in space. Meet the "two unified" responsibilities of natural resource management.

The products under the new basic surveying and mapping system can be divided into geographical scene products and geographical entity products according to their uses. Wuhan has established 2 types of data of geographical entity and geographical scene through the pilot, 1 type of standard products including video stream panoramic map, real 3D products, 4D+, etc., and 1 type of application products including natural resource management base map, national space planning and management status quo base map, urban infrastructure resource base map, etc.

In order to meet the requirements of intelligent holographic mapping of geographical scenes and geographical entities, especially in the complex urban environment, it is necessary to comprehensively use a variety of acquisition technologies to obtain multi-source geospatial information data to ensure the complete collection of urban holographic data.

In addition to the traditional measurement and acquisition methods, 3D laser (including airborne, vehicle-mounted, ground station and portable 3D SLAM) and tilt photogrammetry technology and other more efficient new surveying and mapping technology has become the main acquisition technology means of new basic surveying and mapping.

Through the comprehensive utilization of these collection technologies, urban holographic geographic elements can be covered, basic geographic information elements can be updated annually, and important elements can be dynamically updated. Therefore, three-dimensional laser, as an indispensable new surveying and mapping technology, can help the collection method be more efficient, the collection content is richer, the data accuracy is higher, and the application results are more diverse in the process of the construction of the new basic surveying and mapping.