Patent
Coordinate conversion parameter calculating method based on adjacent control point sets
Chaode Yan,Wang Guo,Cunji Yang,Xianxue Luo,Jiankang Zhou,Tongde Guo,Tian He,Shan Zhao,Likun Yang,Yankun Zhao,Shengli Wang +10 more
- 14 Nov 2012
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TL;DR: In this article, a coordinate conversion parameter calculating method based on adjacent control point sets is proposed, which mainly aims at how control points on the periphery of a point to be solved performs automatic and reasonable selection and how to achieve reasonable and efficient automatic calculating of seamless coordinate conversion parameters.
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Abstract: The invention discloses a coordinate conversion parameter calculating method based on adjacent control point sets and belongs to the technical field of earth measurement, digital maps and geographic information. The coordinate conversion parameter calculating method mainly aims at how control points on the periphery of a point to be solved performs automatic and reasonable selection and how to achieve reasonable and efficient automatic calculating of seamless coordinate conversion parameters in large-range seamless coordinate conversion parameter calculating. The coordinate conversion parameter calculating method includes: building a Delaunay triangular net on the basis of known control points, automatically extracting an adjacent control point set of each control point on the basis of the triangular net, calculating parameter back substitution and then calculating residual of each point, and accordingly filtering gross error and suspicious control points; and adding parameter points such as map border points or grids, automatically calculating the adjacent control point set corresponding to each point through the Delaunay triangular net built on the basis of control points, and solving coordinate conversion parameters needed by all points on the basis of corresponding adjacent control point sets. By adopting the coordinate conversion parameter calculating method, the coordinate conversion parameters in a wide range can be calculated massively, efficiently and seamlessly, the coordinate conversion parameter calculating method plays an important role in the fields of geodetic coordinate conversion, map data coordinate conversion and the geographic information system, and good economic benefit is obtained.
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Citations
Patent
Comprehensive geographical spatial data coordinate conversion method and system
Qiu Ruqiong,Li Qiang,Hong Liang,Nie Xiaobo,Wang Huini,Shen Fengjiao,Xu Feng,Wang Xueyan,Min Mengran +8 more
- 16 Dec 2015
Abstract: The invention relates to comprehensive geographical spatial data coordinate conversion method and system. The method comprises the following steps: setting a source coordinate format and a target coordinate format; setting a source coordinate system and a target coordinate system; selecting a conversion mode and a conversion model of coordinate conversion, and setting a conversion parameter of the coordinate conversion; inputting coordinate data of a known control point in the source coordinate system and the target coordinate system; calculating coordinate conversion parameters according to the coordinate data of the known control point; and converting the coordinate data of a to-be-converted point in the source coordinate system into the coordinate data of the target coordinate system according to the coordinate conversion parameters. The comprehensive geographical spatial data coordinate conversion method and system can be used for achieving space coordinate conversion between geographical spatial data with different formats and different coordinate forms, proportional scales and coordinate systems, achieving conversion and calculations such as projection and band change of geographical spatial data achievements between different coordinate systems, and achieving conversion parameter calculation and accuracy assessment; meanwhile, the input process of the coordinate data of the control point is simple; and the coordinate conversion efficiency is high.
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Patent
Acquisition method for achievements at survey control point in region lacking in basic data
Hu Jilun,Cheng Zhengfeng,Zeng Qufeng,Zhou Yi,Shengzu Wang,Xu Hui,Zhang Jian,Liu Jiaying,Chen Gong +8 more
- 22 Oct 2014
TL;DR: In this paper, an acquisition method for achievements at a survey control point in a region lacking in basic data is presented, which comprises the following steps: step 1, selecting the pile position of a survey point, burying a control point sign, measuring satellite data according to a static mode by using GPS equipment and calculating WGS84 coordinates of the control point according to measurement data; step 2, acquiring and selecting a label point with both WGS 84 coordinates and national coordinates in a surrounding conversion area of the surveying and mapping area as a superposition point; step 3, solving
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Automatic initial scale map making method based on space distribution of road network
Yan Chaode,Likun Yang,Yankun Zhao,Qiang Zhu,Wang Guo,Shengli Wang +5 more
- 08 Jan 2014
TL;DR: In this paper, an automatic initial scale map making method based on space distribution of a road network is proposed. But the method is not suitable for the use of road networks in the generation process of a digital map, and the initial scale is automatically selected according to the density degree of space distribution.
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Patent
Grid model-based geodetic measurement result transformation method
Hu Wusheng,Li Hang,Nie Xichen,Dong Yanfeng,He Huiming +4 more
- 06 Dec 2019
TL;DR: In this article, a grid model-based geodetic measurement result transformation method is proposed, which comprises the following steps of (S1) carrying out spatial analysis and grid point division on existing geodetective coordinate point position data and carrying out division by adopting uniformly-spaced square grids; (S2) calculating seven geodelectric space coordinate transformation parameters of all gridpoints by using homonymy point data according to a Bursa model and storing the seven geodeto-space coordinates transformation parameters into a database; (3) carryingout interpol
Patent
Coordinate conversion method and apparatus, computer device and storage medium
Fu Yan,Wang Jianhui,Yang Yingxin,Han Fei,Wu Suzhen +4 more
- 11 Jan 2019
TL;DR: In this article, a coordinate conversion method and apparatus, a computer device and a storage medium belonging to the field of geographic information technology, is described, which includes determining characteristic parameters for converting a first coordinate system to a second coordinate system according to a known point, determining a conversion residual of the known point and determining a coordinate correction amount of a grid point according to the characteristic parameter, and establishing a conversion model according to grid correction amount.
References
Patent
Method for rapid transformation of geographical coordinate projection in navigational system
Liao Dexiang,Zhou Xunfei,Wu Lingqi +2 more
- 16 Mar 2005
TL;DR: In this paper, a rapid geological coordinates project conversion method applied in the guide system, which comprises GPS signal receiving module, guide soft and hard wares system, electrical map, position information process and error correction module though which can rapidly match the position information of the moving object into the displays of the guide.
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