Research And Practice Of The Investigation Technology Of Land Use Updated

Land is humanity's indispensable foundation, and the reasonable and sustainable utilization of it is one of the subjects in the present world development. Land branch must master the latest materials about the present situation, location, authority, and quality of the land resource,then in accordance with the development target concerned about local society, economy and ect, they can devise reasonable land utilization project and exert the best benefit of land resource , not only meeting the need of current social development,but laying favourable foundation for the sustainable utilization of the land. In the early 1980s, the first land utilization situational investigation was carried out in our county, and in the middle of 1990s, it was accomplished. In the history, this investigation achieves the most detailed materials about the present situation of land utilization and land resource. In addition, it has also provided the basic material for the devising of the domestic economy, land management and the scientific study. Up till now, 10 years has passed and the land utilization situation has experienced huge change in the most of counties and districts over the country, so we must record the investigation Technology of Land use Updated in time, if we still use the original method (hand record), on the one hand, it cannot meet the need of the rapid economic development, on the other hand, it brings a lot of difficulties in material management and saving. So adopting modern management technology to record and manage land utilization situation is becoming more and more important. In order to implement the new collectivity layout repair of land utilization, perfect the system of land authority, realize the new mechanism of"manage the land by the diagram, use the land on the certificate"and help the government carry out the macroscopical decision, Investigation Technologyof Land use Updated must be included in the agenda.The article studies the main course and key technology of the investigation on land utilization situation renewal, analyses the possible questions in each procedure, put forward the corresponding resolutions, expatiate systematically on the methods and main steps of the investigation, including the preparation of kinds of data ,the building of control points ,aviation image photography and manufacture craft and key technology of orthophoto map. The method of field operation using the orthophotomap, the contents and actual difficulty we will possibly meet in field operation;Database construction method , possible problems in the process and construction. Finally take Investigation Technology of Land use Updated of WenShang county,ShanDong province for example, which analyzes the data from the investigation, works out land utilization direction, then, analyzes the reason for this result. The investigation of the land utilization in ShanDong province is the second phase of the experimentation in the whole nation. The experience obtained is in favor of the national extension,so it is of important practical significance. The contents of each chapter are as follows:As the outline, the first chapter mainly narrates the goal, significance as well as necessity of investigation into renewal of present situation of land utilization. The chapter analyzes relevant situation of present domestic and foreign land utilization and makes detailed analysis upon various remotesensing image material, including the aviationremote sensing material and astronautics remote sensing material mainly SPOT-5 from France and IKONNS as well as QUIK bird from America, thus proposes the concept of data Orthophoto image--the basic image document of investigation technology of updated land use. This chapter proposes the general idea of investigation technology of updated land use, that is, producing 1:10000 standard Digital Orthophoto Map with the latest aerialphoto; performing field operation with Digital Orthophoto Map as the working base map; investigating thoroughly the land types and changes; constructing the database of present landutilization using the field investigation documents; providing accurately abundant data information platform for the land management department.The second chapter of this article started to elaborate the manufacture process and the key technology of Digital Orthophoto Map, including weather choice for aerial photographe, deployment and measurement of ground control points, material preparation for inside work corrections, inside correction principle and methods as well as manufacturing methods of Orthophoto Map. This chapter narrated with emphasis the correction process of Orthophoto using American ERDAS software, the manufacturing method of Digital Orthophoto Map as well as the field data gathering method. Next, the chapter elaborated the technical way of data collection by means of Digital Orthophoto Map, mainly including data collection of land and land type. Collection of land data consists of map speckle data collection and Striation thing data acquisition. According to the characteristic of Digital Orthophoto Map, this chapter analyzed the feature of field data collection, the principle and what should be paid attention to. Finally, this chapter talks about methods in dealing with inside data information to make preparation for the construction of the database.The third chapter illustrates the theories and means of database construction ,focusing on how to build it by means of MAPGIS. The main process is like this: chart scanning and Lamination vector,basic parameter setting, error correcting, projection transformation, joining together different charts and comparative analysis of the areas ,building the topology relations, inputting the attributes of chart spot joining together the data of the similar documents, setting up the systematic data dictionary, inputting and alternating the data and so on.The establishment of database indicates the preliminary success of investigation on the present land usage, Its various kinds of information fruit will be of wide application. It will put the administration of present land usage materials on a standardized and scientific track. This electronic information is easy to be long preserved and can modify the data of present land usage in time, laying solid foundation of the standardization and scientization of land usage in the future.In chapter four, we will introduce the concrete application of this research results by taking the landutilization renewal investigation of Wenshang County in Shandong Province as the example. This chapter first summarized Wenshang County's nature and thesocial economy survey, then tells the technical method and implementation process of the investigation into the present situation of land utilization renewal . After that, the chapter elaborated with emphasis the power obtained by making use of pictures from air survey and the investigation achievement of land type in WenshangCounty. Meanwhile, the County's basic situation of land type and land change are analyzed and the causes of change this decade are found, thus comes the related conclusion of success and failure in the land utilization. Finally, this chapter narrates the precision situation of the achievement, the construction and function of the databasesystem as well as the economic and social benefits brought by this achievement. The completion of renewal investigation into land utilization and construction of database system will offer accurate data information for the resonable land utilization of Wenshang County .Chapter five is the conclusion, mainly about the fruit resulting from study and practice and the problems of solving the essential technology, including the making of Orthophoto Map, division of map speckle, construction and maintenance of the date-base of land utilization situation, use of aerial photos and satellite photos, plus, the data collection of land kind and authority. The setting of the land utilization data-base lays foundation for the the data's dynamic renewal and the infornationizaion of land management, besides, it provides extremely practical basic data for the collectivity layout of land utilization, basic farmland protection layout and development and sorting of the land. take Investigation Technology of Land use Updated of WenShang county,ShanDong province for applied example, which has comprehensively checked out the land utilization situation of the whole county, obtaining the achievement of the combination of photos, data and spots. In addition, the data is of high precision and excellent stability. Owing to the above advantages, this achievement won the silver prize from National Territory Resources Department of ShanDong province, and offers scientific basis for collectivity layout repair of the land utilization in WenShang county.