Google Maps and Microsoft Virtual Earth use a Mercator projection based on the World Geodetic System (WGS) 1984 geographic coordinate system (datum). This Mercator projection supports spheres only, unlike the ESRI Mercator implementation, which supports spheres and ellipsoids. What datum does Google Earth use for elevation?
Google Earth (also Google Maps and Microsoft Virtual Earth) use a Mercator projection based on a spherical datum (in ESRI parlance, datum = “Geographic Coordinate System; GCS”) that is a modification of the WGS84 datum. The “true” WGS84 datum is ellipsoidal (GRS80 ellipsoid) and geocentric; only the geocentric aspect is common to both.
Also, does Google Maps use Mercator projection?
Google Maps and most other online mapping apps use web mercator projection. Our automated system analyzes replies to choose the one that’s most likely to answer the question. If it seems to be helpful, we may eventually mark it as a Recommended Answer.
What is the internal coordinate system of Google Earth?
Wikipedia says, “The internal coordinate system of Google Earth is geographic coordinates (latitude/longitude) on the World Geodetic System of 1984 (WGS84) datum.” WGS84 is the standard. NAD83 and WGS84 are similar enough to each other that you can use one or the other.
If you go to Tools-> Options-> 3D View and look in the ‘Show Lat/Long’ section there are five different coordinate systems listed and whichever system you select will be what Google Earth uses to display locations, both in the status bar as well as in the properties of placemarks.
Google Earth’s native coordinate system is geographic (latitude/longitude, WGS84). So if you have your coordinates in UTM ( Universal Transverse Mercator ), you need to convert them to geographic first before using them in Google Earth.
How does Google Earth show the Earth from a satellite?
Google Earth shows the Earth as it looks from an elevated platform such as an airplane or orbiting satellite. The projection used to achieve this effect is called the general perspective. This is similar to the orthographic projection, except that the point of perspective is a finite (near earth) distance rather than an infinite.
How do you use Google Earth Earth map?
The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles. Users can explore the globe by entering addresses and coordinates, or by using a keyboard or mouse.
How to check the projection of an image in Earth Engine?
In Earth Engine, projections are specified by a Coordinate Reference System (CRS or the crs parameter of many methods). You can check the projection of an image by calling projection () on it:.