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The WGS 84 meridian of zero longitude is the IERS Reference Meridian, [8] 5.3 arc seconds or 102 metres (335 ft) east of the Greenwich meridian at the latitude of the Royal Observatory. [ 9 ] [ 10 ] (This is related to the fact that the local gravity field at Greenwich does not point exactly through the Earth's center of mass, but rather ...
This format, also defined in ISO 19125-1:2004, is sometime known as "WKT 1". [5] Later, evolution of the Coordinate Reference System conceptual model, new requirements and inconsistencies in implementation of WKT 1 format between different software have encouraged the revision of that format.
Coordinate conversion is composed of a number of different types of conversion: format change of geographic coordinates, conversion of coordinate systems, or transformation to different geodetic datums. Geographic coordinate conversion has applications in cartography, surveying, navigation and geographic information systems.
The ECEF coordinate system has the following parameters: The origin at the center of the chosen ellipsoid. In WGS 84, this is center of mass of the Earth. The Z axis is the line between the North and South Poles, with positive values increasing northward.
Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator [1] or WGS 84/Pseudo-Mercator is a variant of the Mercator map projection and is the de facto standard for Web mapping applications. It rose to prominence when Google Maps adopted it in 2005. [2]
EPSG:3857 - Web Mercator projection of WGS 84, used for display by many web-based mapping tools, including Google Maps and OpenStreetMap. EPSG:9989 - International Terrestrial Reference Frame 2020 (ITRF2020) for 3D coordinates (latitude, longitude, ellipsoidal height) with subcentimeter accuracy, used for monitoring continental drift among others.
Outputs the globe symbol linking to interactive maps; WGS-84 coordinates linking to GeoHack using the coord figures; OS grid reference (with WGS84 co-ordinates as a rollover box) linking to GeoHack using the OS ref.(Printed/pdf pages get both sets of coordinates printed at standard size)
The mapcode algorithm defines how a WGS 84 coordinate (a latitude and longitude) ... The mapcode system was designed specifically as a free, brand-less, international ...