Study On 3-D Near Surface Velocity Model Based On Multisource Data Fusion

In this thesis,ESRI is taken as the platform studying 3D near surface velocity model based on multi-source data fusion,the main contents are as following:1.Researching basis of near surface three-dimensional modelling.In this part,near surface exploration fields and related data are analysed in detail,and the commonly used three-dimensional spatial data models(surface model,voxel model and hybrid model)and modelling methods are summarized.2.Discussing the near surface of the multi-source and multi-scale data modeling method.First carries on the elaboration to thestudy of the concept of multi-scale,and then based on the analysis the data of multi-source and multi-scale characteristics of the near surface,researching method of multiscale modeling,including data organization model and the multi-scale modeling method.3.On the base of analyzing the advantages and disadvantages of the use of ArcGIS in threedimensional modeling,study the 3D data model in ArcGIS MultiPatch type,summarized it's creating method,and on this basis,research on the ArcGIS based terrain modeling and texture mapping method and voxel(GTP model and GeoCellular model)modeling methods,and the GeoCellar model MultiPatch whether closed are discussed.4.Near surface of 3D modeling visualization prototype system.Research on the method of 3D modeling based on ArcGIS,the design and implementation of a database management,3D modeling,multi scale display and other functions of the near surface of 3D modeling visualization prototype system,and lay the foundation for the effective use of the near surface survey data and comprehensive research.