“一带一路”25个港口城市及其周边区域海岸线分类数据集（2015）
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基于2015年成像的58景Landsat8OLI卫星影像，并参考Google Earth高分辨率影像，进行“一带一路”海上丝绸之路沿线25个重要港口城市及其周边区域海岸线位置提取和类型划分研究。25个港口城市分别是：上海、釜山、新加坡、雅加达、皎漂、曼谷、关丹、孟买、瓜达尔、加尔各答、吉大港、科伦坡、多哈、阿巴斯、吉达、迪拜、里斯本、圣彼得堡、吉布提、苏丹港、亚历山大、比雷埃夫斯、伊斯坦布尔、悉尼、达尔文。海岸线采用平均高潮线定义，分为自然岸线和人工岸线2大类，其中，人工岸线又分为丁坝突堤、港口码头、围垦中岸线、养殖岸线、盐田岸线、交通岸线、防潮堤岸线7种类型。研究表明：上海、新加坡、釜山等较为成熟和发达的港口城市及其周边区域的港口码头岸线以及与其配套的交通岸线等的分布较为普遍；皎漂、瓜达尔、关丹、吉布提等新兴或规模较小的港口城市及其周边区域仍然拥有非常丰富的自然岸线；其他的大多数港口城市及其周边区域则是明显有别于上述2类，即有相当规模的港口码头等人工岸线，又有大量的自然岸线。该数据集按照单个港口城市分别存储，数据格式为*.shp，25个港口城市的数据压缩后磁盘空间为855KB。
Based on 58 scenes of Landsat 8 OLI satellite imagery acquired in 2015 and with reference to high-resolution Google Earth imagery, this study conducted coastline extraction and classification for 25 key port cities and their surrounding areas along the Maritime Silk Road of the Belt and Road Initiative. The 25 port cities are: Shanghai, Busan, Singapore, Jakarta, Kyaukpyu, Bangkok, Kuantan, Mumbai, Gwadar, Kolkata, Chittagong, Colombo, Doha, Bandar Abbas, Jeddah, Dubai, Lisbon, Saint Petersburg, Djibouti, Port Sudan, Alexandria, Piraeus, Istanbul, Sydney, Darwin. Coastlines are defined by the mean high water line, and are categorized into two major classes: natural coastlines and artificial coastlines. Artificial coastlines are further subdivided into seven subtypes: groynes and jetties, port wharves, coastlines under reclamation, aquaculture coastlines, salt pan coastlines, transportation coastlines, and tide-protection embankment coastlines. The study reveals that in relatively mature and developed port cities such as Shanghai, Singapore and Busan and their surrounding areas, port wharf coastlines and their supporting transportation coastlines are widely distributed; emerging or smaller-scale port cities including Kyaukpyu, Gwadar, Kuantan and Djibouti and their surrounding areas still possess abundant natural coastlines; most of the remaining port cities and their surrounding areas are distinctly different from the two aforementioned categories, featuring both considerable artificial coastlines such as port wharves and abundant natural coastlines. This dataset is stored individually for each port city, with the data format being *.shp. The compressed disk space occupied by the data of the 25 port cities is 855 KB.
