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首页> 外文期刊>Arabian Journal for Science and Engineering >Analytical Study of 3D Transformation Parameters Between WGS84 and Adindan Datum Systems in Sudan
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Analytical Study of 3D Transformation Parameters Between WGS84 and Adindan Datum Systems in Sudan

机译：苏丹WGS84与Adindan Datum系统之间的3D转换参数的分析研究

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Coordinate transformation between various reference datums or systems is an essential tool in geospatial tasks such as surveying,geodesy and photogrammetry. Transformation of coordinates is a mathematical process that converts coordinatesof a point in one reference datum into coordinates of the same point in the other reference datum. This issue is still criticalfor the earth sciences scholars in Sudan because the topographic maps were carried out based on the local datum (Adindan)and the recent surveying activities are performed using Global Positioning System, i.e., based on WGS84 reference datum.To resolve the transformation problem between the WGS 84 and Adindan datum systems, the current study explores twotransformation methods, namely Bursa–Wolf and Molodensky–Badekas. The least squares observation equations and thecombined case versions of Bursa–Wolf and Molodensky–Badekas are employed to estimate different transformation parameters.These parameters are tested and validated using coordinates of 32 first-order points known in both Adindan andWGS84 datum systems. The results are further verified by a statistical test. Through the residuals estimated, the suitabilityof the transformation methods for application in the study area is thoroughly discussed. To make survey data usable andaccessible to all, it is essential to establish reliable transformation parameters where data collected in one system can easilybe transformed into the other. Therefore, if the relationship between the WGS84 and Adindan (local) reference systems isaccurately established and verified by higher quality control indices, we can promote mapping and other survey activities inSudan. Again, Sudan has a large and extensive local network. This network can be easily reduced to the worldwide platformif the transformation parameters between the two systems are precisely estimated.
机译：各种参考基准或系统之间的坐标转换是地理空间任务（如勘测，大地测量和摄影测量）中必不可少的工具。坐标变换是将一个参考基准中的一个点的坐标转换为另一参考基准中的同一点的坐标的数学过程。这个问题对于苏丹的地球科学学者来说仍然是至关重要的，因为地形图是根据当地基准（阿丁丹）绘制的，并且最近的测量活动是使用全球定位系统（即WGS84参考基准）进行的。关于WGS 84和Adindan基准系统之间的问题，当前的研究探索了两种转换方法，即Bursa–Wolf和Molodensky–Badekas。使用最小二乘观测方程以及Bursa–Wolf和Molodensky–Badekas的组合案例版本来估计不同的转换参数。这些参数使用在Adindan和WGS84基准系统中已知的32个一阶点的坐标进行测试和验证。结果通过统计检验进一步验证。通过估计残差，深入讨论了转换方法在研究领域中的适用性。为了使调查数据对所有人都可用和可访问，必须建立可靠的转换参数，以便将一个系统中收集的数据轻松转换为另一个系统。因此，如果WGS84和Adindan（本地）参考系统之间的关系得到了正确的建立并通过更高的质量控制指标进行了验证，则我们可以促进苏丹的制图和其他调查活动。苏丹再次拥有一个庞大而广泛的本地网络。如果精确估计两个系统之间的转换参数，则可以轻松地将该网络简化为全球平台。

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