【文章內(nèi)容簡(jiǎn)介】 earth sciences. VR: Virtual Reality ，虛擬現(xiàn)實(shí)。 VR: Virtual Reality, virtual reality. GPS： Global Positioning System, 全球定位系統(tǒng)。 GPS:Global Positioning System, global positioning system. GIS： Geographical Information System, 地理信息系統(tǒng)。 GIS:Geographical Information System, geographic information system. RS： Remote Sensing, 遙感（本意是 “遙遠(yuǎn)的感覺 ”） Remote sensing (RS:Remote Sensing, is intended to feel distant) VLBI: Very Long Baseline Interferometry,甚長(zhǎng)基線干涉測(cè)量。 VLBI: Very Long Baseline Interferometry, very long baseline interferometry. SLR： Satellite Laser Ranging,衛(wèi)星激光測(cè)距。 SLR:Satellite Laser Ranging, satellite laser ranging. The main task of the modern geodetic surveying are: 1. Establish and maintain the timevarying 3D high precision geodetic coordinate system。 changes in the fine structure of precise determination and Study on the shape, size and the earth gravity field and with time。 the monitoring and interpretation, surface crust (including marine) various geodynamic phenomena. From the above definition, the main task of the modern geodetic surveying from surface geodetic classic development of space geodesy modern science, modern geodesy and modern geodesy. Especially the development of space geodesy, will lead the development of the subject. And the status of modern geodesy: fast, accurate land survey, planning to provide a variety of scale topographic map, provide accurate geodetic data for the exploitation of marine resources of land. ② in the ground, space, marine running on all the traffic tools to provide accurate, realtime navigation and positioning. Will play an important role in safeguarding for space science development, national defense construction. In order to earthquake, flood, landslide, debris flow, El Nino and other natural disasters, development forecast, forecast. Play an active role in disaster prevention, disaster reduction, disaster relief. The accurate determination of the motion of the plates, the pole shift, the earth39。s rotation rate, and gives the geodynamic interpretation, make a contribution to the study of earth science. A large amount of information and Digital Earth are related to geographic information, these related with geographical information, must be based on the same reference frame, theory and method for setting up the frame of reference can only adopt the modern geodesy. Therefore. The modern geodesy is the support of the subject construction of Digital Earth spatial data framework. Thus, the modern geodesy in people39。s daily life, economic construction, National Science and technology development, national security and other aspects will play a positive role, will be the era of knowledge and information era, the prehensive national strength of the new growth point, the army39。s role in the play in the rich countries will be more and more. [geodesy Knowledge Window]. Bulletin of Surveying and mapping in 2021 eighth page twentyfirst. 2, photogrammetry and remote sensing (photogrammetry and remote sensing): geometric and physical information on the electromagic wave sensor acquisition target, shape, size, spatial location to determine the target, interpretation of its properties and relations, and a discipline graphics, image and digital form theory and technology. The subject was mainly used for topographic mapping. With the development of Surveying and mapping technology and remote sensing technology, photography and research objects bee more and more diverse, the theory of remote sensing camera today in many scientific fields. 3, engineering surveying (Engineering Surveying): Research on the construction and development of natural resources in the survey and design, construction, pletion and operation management of various stages of control surveying, topographic surveying, cons