WorldHydrographyDayのTwitterイラスト検索結果。 2 件

Happy #WorldHydrographyDay! Here's a recent water map.

It's also #WorldHydrographyDay 🌊Hydrography is the #science of #surveying and charting seas, lakes, rivers and more. Theme for 2018 is Bathymetry. Map by the Royal Geographical Society using #data compiled by Dr. John Murray. Pub. 1899 💦 More sea charts: https://t.co/CpVuXmDeGS