摘要
提出了一种海岛岸线遥感测图精细测量新方法,该方法直接基于理论定义的海岸线,利用航空影像瞬时水涯线数据在立体测图环境中提取瞬时水位高程;利用海岛周边精密海潮模型和瞬时水位高程推算海岛岸线高程;最后依据海岛岸线高程,采用立体测图方法测制海岛岸线的平面位置。该方法确保了海岛岸线成果的唯一性和连续性,适合大比例尺的大陆海岸线和海岛岸线测量。测试结果显示,在较高精度海潮模型和海面地形支持下,海岛岸线高程精度优于0.2 m,可满足1∶2000测图要求。
A new method for accurately surveying and mapping the shoreline of an island is proposed where the theoretically shoreline defined by the high water（MHHW） is adopted as the shoreline indicator of the island. This method utilizes the height of the instantaneous shoreline extracted from the aerial images to obtain the height of the shoreline by combining the precise ocean tide model and the height of the instantaneous shoreline,and then the horizontal position of the shoreline can be tracked by the stereo imaging and mapping method with the obtained height of MHHW. The proposed method can keep and ensure the continuity and uniqueness of the shoreline relative to the field measurements for shoreline mapping,and this method can be widely applied to large-scale shoreline mapping of mainland and islands.Experimental test indicates that the height accuracy can reach 0.2 m and it can be applied to the island mapping of the scale 1 ∶ 2000.
出处
《测绘通报》
CSCD
北大核心
2017年第11期47-50,共4页
Bulletin of Surveying and Mapping
关键词
海岛岸线
立体测图
瞬时水位
海洋潮汐
island shoreline
stereo mapping
instantaneous water level
ocean tide
