ASTM D4544-20 Standard Practice provides a method for estimating the thickness of peat deposits, which is applicable to the exploration and extraction of peat. The standard describes the steps and requirements for estimating the thickness of peat deposits using geological survey techniques, drilling, survey data, and analytical methods. Guided by this standard, it is possible to accurately assess the depth and distribution of peat beds, providing a scientific basis for peat resource extraction, environment protection, and land use planning. The standard covers a variety of estimation techniques, including drilling sampling, subsurface exploration, and Miscellaneous Measuring methods, ensuring Reliability and Accuracy of Data.