Research On Three Dimensional Visualization Data Acquisition Method

In recent years,there have been many new technologies in the field of surveying and mapping,and some of the many new technologies have been widely used,such as threedimensional laser scanning technology,tilt photography measurement technology,these technologies have become the current mapping One of the problems studied by the subject.The traditional mapping method to obtain the two-dimensional mapping results in the performance of the more scarce,the results have been unable to meet people in modern social life on the production and living needs.The three-dimensional model used in architecture can visually reflect the true appearance of the building,combined with the GIS platform,can accurately represent the spatial attribute information of the model.So,the combination of mapping and architecture can be better to complete the three-dimensional visualization of the data.In the previous architectural modeling work,the design staff for the size and size of the model is more casual,the model established the dimensional accuracy and real model gap.In order to rationally use the mapping method to solve this problem,this paper has compared the advantages and disadvantages of some high-tech,and finally selected the three-dimensional laser scanning technology and tilt photogrammetry technology as the representative of the case to introduce.In the case of the establishment of the gate model of the town of Qi Taiwan,the preprocessing process of the cloud data is described in detail.Including the use of interactive methods to cut the number of cloud points,the use of equal spacing method to compress the amount of cloud data and so on.Finally,the difference between the size of the town gate model and the size of the real building is analyzed,and the reason of the error is analyzed,and the larger error part is corrected to obtain the accurate point cloud model.The experimental results show that the three-dimensional laser scanning technology is suitable for the highprecision modeling work of small-scale single-building or small-scale building.In the case of Turpan Old City historical characteristics of the case of the application of the tilt photogrammetry technology,the use of UAV field flight to obtain images,software automation to complete the basic establishment of the model.Use the City maker software to model the model and coordinate data to get a real three-dimensional scene.The reality of this three-dimensional environment plays an important role in urban planning and so on,and its measurement accuracy is also in line with the requirements of mapping.As a case technology,the advantages of the two new technologies in their respective fields have been verified.It is expected that the 3D laser scanning technology and the tilt photogrammetry technology will be combined in the future surveying and mapping to obtain more efficient and convenient mapping methods and more accurate and accurate mapping Results.