What Srid 3857?
What Srid 3857?
EPSG:3857 is a Spherical Mercator projection coordinate system popularized by web services such as Google and later OpenStreetMap.
What does SRID 4326 mean?
A common SRID in use is 4326, which represents spatial data using longitude and latitude coordinates on the Earth’s surface as defined in the WGS84 standard, which is also used for the Global Positioning System (GPS).
What is SRID in spatial data?
A spatial reference identifier (SRID) is a unique identifier associated with a specific coordinate system, tolerance, and resolution. How the SRID is populated or what it represents can vary depending on what database you use to store your data.
Is WGS84 conformal?
WGS 1984 Web Mercator and WGS 1984 Web Mercator (Auxiliary Sphere) use a conformal projection that preserves direction and the shape of data but distorts distance and area. Note that distances are very distorted in the east-west direction, north or south of the Equator.
What projection does OSM use?
Pseudo-Mercator projection
Spherical Pseudo-Mercator projection Most of OSM, including the main tiling system, uses a Pseudo-Mercator projection where the Earth is modelized as if it was a perfect a sphere. Combined with the zoom level, the system is known as a Web Mercator on Wikipedia.
What is EPSG coordinate?
EPSG stands for European Petroleum Survey Group and is an organization that maintains a geodetic parameter database with standard codes, the EPSG codes, for coordinate systems, datums, spheroids, units and such alike. Every geographic object (coordinate system, spheroid, unit etc.) gets assigned a unique number.
What is the full form of WGS?
The World Geodetic System (WGS) is a standard for use in cartography, geodesy, and satellite navigation including GPS.
What is spatial reference ID SRID?
