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| 基于地形特征点和小比例尺地形图的大比例尺成图技术 |
| Study on large scale mapping method by fusing contour line of small scale topographic maps and topography feature points |
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| DOI： |
| 中文关键词: 小比例尺 特征点 等高线 大比例尺 |
| 英文关键词: small scale feature points contour line large scale |
| 基金项目:大地测量与地球动力学国家重点实验室基金资助项目（SKLGED2014-5-3-E）；国家自然科学基金资助项目（41474014）；煤炭资源与环保湖南省重点实验室基金资助项目（E21221） |
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| 中文摘要: |
| 针对等高线绘制需要大量高程点数据以及植被覆盖地区很难直接量测的特征，提出了一种基于小量实测特征地形点线数据与已有小比例尺地形图等高线的大比例尺地形图等高线的成图方法.选取已有小比例尺地形图的湘潭县山区作为试验区，利用小量实测特征点高程数据控制矫正小比例尺等高线，实验分析其大比例尺成图精度，评价生产的大比例尺地形图实际应用价值.试验证明该地形图成图方法能降低劳动强度，提高测量效率，是一种实用而高效的大比例尺地形图等高线成图方法. |
| 英文摘要: |
| Mapping contour lines requires a large number of elevation points data and it’s very difficult to survey the area with vegetation cover.Considering the disadvantages mentioned above, the large scale mapping method was put forward by fusing the contour lines of small scale topographic maps and feature points with CASS mapping software.The mountain area of Xiangtan county,already having its small scale mapping,was chosen as the experimental area.The large scale contour line was adjusted by surveying some elevation data and using the small scale mapping. The precision of fused contour lines were compared and analyzed the practical value of producing large scale mapping by this way.It proves to be reducing the labor intensity and raising the measuring efficiency and it is a practical and efficient large scale mapping method. |
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