The Research On Large-scale Map-making With Photogrammetry Method

With the development of national economy, it is an important task in mapping field to register and survey the land utilization and renewal, to guarantee data's accuracy and reality. In recent years, the speed of the cadastre resources' renewal in part of domestic regions has improved by 30%. When you take on large-scale cadastration, it is obviously an economical and reasonable method to get drawing material by aerial surveying.This paper adapts the exploration study on measuring the large-scale cadastre by aerial surveying method. It combines the real production process of forming the large-scale cadastre with the aerial surveying method in Shangqiu, HeNan. We can find there exists a few problems in the project. The paper studys the problems in the item's implement and brings forward some solutions to technologic difficulties. It studys the working methods of measuring the large-scale cadastre by aerial surveying means, some scientific and technological problems of enhancing working efficiency and precision, and the technology of enhancing the measuring efficiency of large-scale cadastre by use of aerial surveying method. It also studys the methods of measuring the large-scale cadastre by aerial survey and the informations' collections and disposal. It aims to draw up a suit of completed interal and caternal working methods and regulations which are applicable to the big scope production. This paper mainly includes the below contents.(1)Probing the external methods based on the aerial survey means and image data measurement, especially the demands and results of esternal working; introducing the surveying method of digital cadastre, especially the principles and implementation procedure of "two internal and two externals".(2)Inquiring and analyzing the internal experimental data precision of measuring the large-scale cadastre by aerial survey method; Introducing precision problems on the bases of concrete items.(3)Based on ShangQiu's cadastration, the paper introduces the methods and results of the large-scale cadastration and proves the feasibility by producing examples.