GB/T 12898-2009
ActiveSpecifications for the third and fourth order leveling
国家三、四等水准测量规范
Application Summary AI generated
GB/T 12898-2009 specifies the technical requirements, procedures, and accuracy standards for third and fourth order leveling surveys, which are used to establish vertical control networks for mapping, engineering construction, and deformation monitoring. It is applied in fields such as geodetic surveying, civil engineering, and infrastructure projects where precise elevation measurements are needed for tasks like railway or highway alignment, building foundation setting, and subsidence observation. The standard ensures consistent measurement methods and data quality across national and regional surveying operations in China.
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