Process And Applied Of 3S Data In The Project Of Land Consolidation

Land consolidation is a re-distribution and re-optimization process on land resources and their utilization and also a very complicated systematic-engineering. Along with the nationwide implementation of land consolidation, many new scientific issues to be solved urgently have emerged, particularly, national invested land consolidation project management, with the precondition of managing project by institution, it also need advanced science and technology to manage project assistant to improving the efficiency of project management and scientific level.There are some impending problems on quantified description of land consolidation using "3S" technology:(1) In many regions where the big scale is absent, how to resolve the problem about the geometric correction of the high precision remote sensing image; (2)the original data and the interpolating method are the two main factors that affect the precision of DEM, the problem is how to obtain the true value and to analyze the effect of the original data and interpolating method on the precision of earthwork; (3)when calculating the earthwork through DEM that are constructed by vectoring the relief map, how to improve the accuracy of the earthwork by advanced technology. Since the error is the inherent attribute of the spatial data, it can't be completely eliminate but to improve the data accuracy step by step. Therefore, it it of important significance to discuss the effect of different interpolating method, how to obtain the original data, and the sources of errors on the precision of data.In this paper the author take the Chunhua town in Changsha City for example introduces remote sensing image geometric correction method and accuracy analysis and comparison; Using the entity modeling analysis DEM surface modeling accuracy image factor; Application of different GIS software calculation methods and steps of the account of earthwork quantity of, and the calculated results and analysis.