Core Viewpoint - The successful launch of the Resource 3 satellite 04 enhances China's capability in obtaining spatial geographic information independently and improves the level of surveying and mapping services [1] Group 1: Satellite Features - The Resource 3 satellite 04 is equipped with three core payloads: a tri-stereo camera, a multi-spectral camera, and a laser altimeter, which collectively enhance the satellite's surveying capabilities [1] - The tri-stereo camera functions like a "3D photographer," capturing images from three different angles to create three-dimensional representations of observed objects [2] - The multi-spectral camera acts as a "fingerprint collector," identifying and analyzing the spectral characteristics of various elements and compounds on Earth, enabling the differentiation of land types and assessment of agricultural productivity and environmental conditions [3] - The laser altimeter serves as a "space ruler," measuring the relative height of ground points with sub-meter precision over distances of approximately 506 kilometers [4] Group 2: Satellite Constellation and Impact - The Resource 3 series, which includes satellites launched in 2012, 2016, and 2020, has broken foreign monopolies on high-precision 3D mapping data, providing China with independent and controllable high-quality satellite mapping data [5] - By December 2025, the Resource 3 series is expected to have acquired 4.03 million valid image data sets, covering an area of 137 million square kilometers, which is about 91% of the global land area, significantly advancing the geographic information industry and remote sensing technology applications [5] - The newly launched Resource 3 satellite 04 will replace the retired Resource 3 satellite 01 and will work alongside satellites 02 and 03 to form a high-resolution 3D mapping satellite constellation, increasing the capability for obtaining national basic surveying data by 1.5 times [5]