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| Method and achievement of GPS waypoint generation for survey grid layout in geophysical and geochemical exploration |
ZHANG Qi( ), LIU Duo-Zhao, ZHANG Wan-Ren() |
| Geological Survey of Gansu Province,Lanzhou 730000,China |
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Abstract Survey grid layout is a preliminary task of geophysical and geochemical exploration. The widespread use of handheld GPS has greatly facilitated navigation and positioning in small-to medium-scale geophysical and geochemical field surveys. This study, based on coordinate transformation theory, presented a method for generating large numbers of GPS waypoints for both regular and irregular survey grids for geophysical and geochemical exploration. Furthermore, an associated software program was developed. The software enjoys simple interfaces and convenient operations, enabling the quick generation of survey grids suitable for applications such as gravity, magnetic, and resistivity surveys, soil surveys, and stream sediment surveys. Therefore, this software can be used for field navigation.
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Received: 10 July 2024
Published: 26 February 2025
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WGS-84 coordinate system
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Definition for CGCS2000
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| 椭球体 | 长半轴a/m | 短半轴b/m | 扁率f | 采用情况 | | Krassovsky | 6378245 | 6356863.018 | 1/298.300 | 北京54坐标系 | | IUGG 75 | 6378140 | 6356755.288 | 1/298.257 | 西安80坐标系 | | WGS 84 | 6378137 | 6356752.314 | 1/298.257 | 美国GPS | | CGCS 2000 | 6378137 | 6356752.314 | 1/298.257 | 2000国家大地坐标系 |
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Ellipsoid parameters for four coordinate systems
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Technical flow chart
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GPS waypoint grid generation software interface
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Generated regular GPS waypoints in MapSource
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Generated irregular GPS waypoints in MapSource
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Input interface for Bursa transformation parameters
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