Spherical map of earth. What is spherical mercator spherical mercator is a de facto term used inside the openlayers community and also the other existing open source gis community to describe the projection used by google maps microsoft virtual earth yahoo maps and other commercial api providers. The art engineering and imagination of bejohnson and joy alyssa day. Used since the 16th century for navigation straight lines on this map can be used accurately as compass bearings but the size and shape of continents are distorted. The earth is massive enough that gravity maintains it as a roughly spherical shape.
The big flat world map in your high school classroom the atlas youve used to navigate during a road trip and even google maps are all lying to you. Many ancient cultures subscribed to a flat earth cosmography including greece until the classical period the bronze age and iron age civilizations of the near east until the hellenistic period india until the gupta period early centuries ad and china until. Introduction spherical trigonometry deals with triangles drawn on a sphere. The flat earth model is an archaic conception of earths shape as a plane or disk.
The subject originated in the islamic caliphates of the middle east north africa and spain during the 8th to 14th centuries. See current wind weather ocean and pollution conditions as forecast by supercomputers on an interactive animated map. Its formation into a sphere was made easy by its primordial hot liquid phase.