GB 12897-1991
AbolishedSpecifications for the first and second orderleveling
国家一、二等水准测量规范
Application Summary AI generated
GB 12897-1991 specifies the technical requirements, procedures, and accuracy standards for first and second order leveling surveys in China. It is applied in national geodetic control networks, large-scale engineering projects, and scientific research requiring precise vertical measurements, such as monitoring land subsidence or establishing elevation benchmarks. The standard ensures consistency and reliability in high-precision elevation data across diverse terrains and construction contexts.
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