GB/T 12897-2006
ActiveSpecifications for the first and second order leveling
国家一、二等水准测量规范
Application Summary AI generated
This standard specifies the technical requirements and procedures for first and second order leveling, which are the highest precision categories of vertical geodetic surveying in China. It is applied in the establishment and maintenance of national vertical control networks, large-scale engineering projects such as high-speed rail and dam construction, and scientific research requiring precise elevation data, including crustal deformation monitoring. The standard ensures consistent accuracy and methodology across all official surveying and mapping activities that demand millimeter-level vertical measurements.
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