Method for Technical Problem-solving in the Second Land Invesigation

Through analysis of the main differences in investigation techniques between land use updated survey and the second land investigation,a serious error of results of an investigation made by image fitting was found.Combination of experience for land use invesigation in the past few years,a method called differential correction was proposed.It not only effectively solve the error-problem caused by image fitting,but also shorten the work cycle and improve efficiency.