3D Globe (2-color elevation mapping) You can change the orientation by the mouse drag/swiping. Space key: switch the color mode 0-4 keys: set the predefined angles 4 parameters at the corners are adjustable. --- 日本語 --- 3D地球（２段階高度） マウスドラッグで回転できます。 スペースキー：マップの変更 '1'~'4'キー：回転軸セット 画面コーナーで４つのパラメータを調整できます。
Map data : edited raster data copied from https://www.gebco.net/data_and_products/gridded_bathymetry_data/gebco_2020/ The color boarder between the green and orange must be around 500m altitude. 2000 dots are used for the surface of the earth (653 dots for land) Algorithm to make a uniform dot pattern on a spherical surface: Saff, E.B., Kuijlaars, A.B.J. Distributing many points on a sphere. The Mathematical Intelligencer 19, 5–11 (1997). https://doi.org/10.1007/BF03024331 Data processing stream: Raster data->Low resolution->Projection onto the spherical dots & 3-color coding #pen #sphere #globe #color #3d #earth #art #planet #animation #地球 #地球儀 #３次元
