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Abstract
Abstract. High‐precision land survey data is important foundation for fine management of land resources and enhancement of land use efficiency. The main method for land survey is remote sensing (RS) survey. However, the accuracy of data gained through this method is susceptible to image map, boundary interpretation, plotting process and other factors. To improve the accuracy, the method of precision correction of land investigation data that is based on high resolution image data with geometric correction model was discussed in detail. Technical test was conducted in some area of GuangZhou in China, and experimental results showed that the method can improve the accuracy of land survey data effectively.
Highlights
Land survey data is having a wide range of applications, and has been applied in every aspect of society, effecting and changing people’s daily life[1]
The first is the accuracy of remote sensing data, as all the boundary line of plot is mapped from remote sensing data; the second is the method of boundary interpretation, different surveyor would get different boundary for the same plots as there are allowance, including visual error, pixel error and so on; the third is the tools used for plotting, generally GIS software is used for data processing, and it will generate errors during the process of coordinate transformation, file format conversion, scaling etc
Xu Yu‐Ying[9] put forward some proposal and quality control requirements on digitization in office operation of land survey; Xu Hai‐Jun[10] introduced some quality control methods in charting base map, field survey, plotting in office operation and inserting database ; Su Hao‐jiang[11] found out the precision rule and reason of effecting precision of data classified by terrain elements in 1:500 digital aerophotogrammetry mapping, adopted measures in field mapping to warrant the precision quality of final map; Fan Ming‐hua[12] put forward the methods of debris erase and debris dissolve to deal with the problem of lots of debris when overly farmland map and the second land survey data
Summary
Land survey data is having a wide range of applications, and has been applied in every aspect of society, effecting and changing people’s daily life[1]. Xu Yu‐Ying[9] put forward some proposal and quality control requirements on digitization in office operation of land survey; Xu Hai‐Jun[10] introduced some quality control methods in charting base map , field survey, plotting in office operation and inserting database ; Su Hao‐jiang[11] found out the precision rule and reason of effecting precision of data classified by terrain elements in 1:500 digital aerophotogrammetry mapping, adopted measures in field mapping to warrant the precision quality of final map; Fan Ming‐hua[12] put forward the methods of debris erase and debris dissolve to deal with the problem of lots of debris when overly farmland map and the second land survey data These methods mentioned above achieved the purpose of improving the accuracy of land survey data to some extent, but they only reduced certain type of error in land survey data and aimed at part of the whole correction process, and the methods for reducing all types of plots errors were not proposed. Summary about the method is concluded, some unsolved problems and proposals are discussed as well
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