Rapid Mapping Method Based on Free Blocks of Surveys
-
Xianwen Yu
,
Huiqing Wang
Abstract
While producing large-scale larger than 1:2000 maps in cities or towns, the obstruction from buildings leads to difficult and heavy tasks of measuring mapping control points. In order to avoid measuring the mapping control points and shorten the time of fieldwork, in this paper, a quick mapping method is proposed. This method adjusts many free blocks of surveys together, and transforms the points from all free blocks of surveys into the same coordinate system. The entire surveying area is divided into many free blocks, and connection points are set on the boundaries between free blocks. An independent coordinate system of every free block is established via completely free station technology, and the coordinates of the connection points, detail points and control points in every free block in the corresponding independent coordinate systems are obtained based on poly-directional open traverses. Error equations are established based on connection points, which are determined together to obtain the transformation parameters. All points are transformed from the independent coordinate systems to a transitional coordinate system via the transformation parameters. Several control points are then measured by GPS in a geodetic coordinate system. All the points can then be transformed from the transitional coordinate system to the geodetic coordinate system. In this paper, the implementation process and mathematical formulas of the new method are presented in detail, and the formula to estimate the precision of surveys is given. An example has demonstrated that the precision of using the new method could meet large-scale mapping needs.
Acknowledgments
This work is financially supported by the Land Industry Research Special Funds for Public Welfare Projects of China (project 20121102303).
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Articles in the same Issue
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Articles in the same Issue
- Frontmatter
- Research Articles
- A Spatial Analysis of GEOID03 and GEOID09 in Connecticut
- Evidence of Postseismic Deformation Signal of the 2007 M8.5 Bengkulu Earthquake and the 2012 M8.6 Indian Ocean Earthquake in Southern Sumatra, Indonesia, Based on GPS Data
- Source Model from ALOS-2 ScanSAR of the 2015 Nepal Earthquakes
- Improving the Quality of Low-Cost GPS Receiver Data for Monitoring Using Spatial Correlations
- Rapid Mapping Method Based on Free Blocks of Surveys
