Strait of Juan de Fuca and Southern Vancouver Island, 1872_2024

Georeferenced hydrographic chart of the Strait of Juan de Fuca and the channels between Vancouver Island and the continent, marking the boundaries proposed by the British and US Governments respectively. Added note transcribed below, signed, Geo. Henry Richards. 2 sea miles to one inch. [Juan de Fuca, Strait, c. 1873]. From the Admiralty Surveys by Captains H. Kellett, R.N., 1847 & G.H. Richards, R.N., 1858-62. At head of title: North America, west coast. Drawn by Edward J. Powell of the Hydrographic Office. Malby & Sons, Lith. Depths shown by soundings in fathoms. Relief shown by hachures and spot heights. Shows detailed topography and bathymetry of the Straits of Juan de Fuca and waters between Straits of Georgia and Admiralty Inlet.本数据集为胡安德富卡海峡（Strait of Juan de Fuca）以及温哥华岛与北美大陆间航道的地理配准水文海图（hydrographic chart），分别标注了英国与美国政府各自提出的边界线。附带有转录于下方的注释，落款为乔治·亨利·理查兹（Geo. Henry Richards）。本图比例尺为2海里对应1英寸，标注有「约1873年，胡安德富卡海峡」字样。本数据源自英国海军部水道勘测成果，由英国皇家海军H·凯莱特上尉（H. Kellett, R.N.）于1847年、G·H·理查兹上尉（G.H. Richards, R.N.）于1858年至1862年完成勘测。标题栏顶部标注为「北美西海岸」，由水道测量局的爱德华·J·鲍威尔（Edward J. Powell）绘制，马尔比父子公司（Malby & Sons）负责平版印制。图中水深以英寻为单位通过测深标记，地形起伏以晕滃线与高程点表示，详细呈现了胡安德富卡海峡以及乔治亚海峡（Strait of Georgia）与阿德默勒尔蒂湾（Admiralty Inlet）之间水域的精细地形与水深地貌。