A method for vector geographic information acquisition based on synchronous correction with remote sensing images
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摘要: 针对现有的基于遥感影像的矢量地理信息采集存在的局限性,提出一种随遥感影像同步纠正的矢量地理信息采集方法。首先不对原始遥感影像进行高精度正射纠正处理,矢量地理信息采集直接基于原始遥感影像进行; 待矢量地理信息采集完成后,再对原始遥感影像进行高精度正射纠正处理; 同时,将矢量地理信息成果按照原始遥感影像正射纠正同一模型、同步纠正,实现遥感影像与矢量地理信息空间坐标系的一致、同步。一方面解决外业调查核查过程中存在的数据安全隐患问题,另一方面有利于改善现有生产工艺流程,提高地理信息采集的时效性。选取平地和山地2种典型地形实验区,以WorldView-2遥感影像为数据源,采用提出的方法实现了矢量地理信息采集。结果表明: 该方法能够保证成果空间定位精度基本满足要求,并能有效解决现有的改进技术方法中可能产生的要素交叉与缝隙问题。Abstract: Given the limitations in the existing vector geographic information acquisition based on remote sensing images, this study proposed a new method, in which the vector geographic information is orthorectified synchronously with remote sensing images. Firstly, the original remote sensing images are no longer processed using high-precision orthorectification, and vector geographic information acquisition is directly carried out based on the original remote sensing images. The original remote sensing images are processed using high-precision orthorectification after the vector geographic information acquisition. Moreover, the vector geographic information is synchronously corrected using the same model based on the original remote sensing images, thus achieving the consistency and synchronization between the remote sensing images and vector geographic information. This method can eliminate the potential risks in data security in the process of field investigation and can help optimize the existing production process and improve the timeliness of vector geographic information acquisition. Taking WorldView-2 remote sensing images as the data source, this study performed the vector geographic information acquisition of two selected typical types of terrain, i.e., plain and mountain, using this method. The results show that this method can ensure that the spatial positioning accuracy of the results can roughly meet relevant requirements and can effectively address the problems of the feature intersection and gaps possibly occurring in the existing improved techniques and methods.
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Key words:
- vector /
- remote sensing image /
- correction /
- RPC /
- process flow
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