![]() You can, optionally, define a vertical coordinate system for a map or scene.Įmpty maps and scenes derive their coordinate systems from the first layer added to them. A map or scene always has a horizontal coordinate system. There are numerous coordinate systems to choose from for maps and local scenes, but the horizontal coordinate system for a global scene is limited to either WGS84 or China Geodetic Coordinate System 2000 (CGCS 2000). For global scenes, the default horizontal coordinate system is WGS84. In a new, empty map or local scene, the default horizontal coordinate system is WGS84 Web Mercator. Coordinate systems can be defined in both maps and scenes. Coordinate systems can be horizontal, defining where features are across the globe, or vertical, defining how high or deep features are relative to a surface. A coordinate system is a reference framework that defines the position of features in either two- or three-dimensional space. Maps and scenes use coordinate systems to locate and display data correctly on the earth's surface and relative to one another.
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