Today, the National Space Administration said that China’s high resolution earth observation system Gao Fen 7 satellite has been officially put into operation. As China’s first civilian sub meter optical transmission stereo surveying and mapping satellite, the launch of the satellite marks the full formation of the space-based earth observation capability with high spatial resolution, high temporal resolution and high-precision observation, which will further meet the users’ demand in basic surveying and mapping, global geographic information guarantee, urban and rural construction monitoring and evaluation, agricultural survey and statistics, etc According to the demand. < / P > < p > the gf-7 satellite was successfully launched on November 3, 2019. The satellite is equipped with dual array stereo camera, laser altimeter and other payloads, breaking through the sub meter level stereo mapping camera technology, and can obtain high spatial resolution optical stereo observation data and high-precision laser altimetry data. Different from other high resolution family satellites, gf-7 carries a “double-line d-image”. It can not only see the color and size of the ground object, but also see the height, and the data information of the ground object is more abundant. Gaofen-7 satellite has realized 1:10000 scale satellite stereo mapping in China, which has greatly improved the level of China’s satellite earth observation and three-dimensional mapping. The high score seven one belt, one road, can not only satisfy the domestic users’ data needs, but also provide strong spatial information support for the countries along the belt and road, which is of great significance for serving the economic and social development and enhancing the international influence of China’s aerospace industry. It is understood that during the orbit test of gaofen-7 satellite, a series of functions such as land illegal supervision, identification of basic ground feature elements, measurement of crop planting area, monitoring of highway construction and other aspects were verified. In order to assist in the elevation survey of Mount Everest in May this year, the land satellite remote sensing application center of the Ministry of natural resources obtained remote sensing images from gaofen-7 and ziyuan-3 satellites, and drew a 1:10000 scale topographic map, which provided a topographic reference for the mountaineering team to climb the summit successfully. In the next stage, the satellite will carry out further research and application in global geographic information acquisition and independent data provision. High score special project is one of the 16 major projects in China. Since it was approved to be launched in 2010, seven satellites, including gaofen-1 to gaofen-7, have been successfully launched. The wide application of high resolution satellites has become an important data and technical support in various fields and departments of the national economy.