What is a wgs84 Web Mercator coordinate system?
Web Mercator Coordinate System It is the de facto standard for web maps and online services. With this coordinate system, the geodetic coordinates defined on the WGS 84 datum are projected as if they were defined on a sphere, using a sphere-based version of the Mercator projection.
What is the function of coordinates in a Mercator chart?
This projection is widely used for navigation charts, because any straight line on a Mercator projection map is a line of constant true bearing that enables a navigator to plot a straight-line course.
Is Web Mercator is a projection or coordinate system?
Web Mercator is a meters based projection that encompasses the entire world, except for the polar regions (latitudes -85 to 85).
What kind of projection is Web Mercator?
cylindrical map projection
The Web Mercator / Pseudo Mercator projection is a cylindrical map projection. This is a variant of the regular Mercator projection, except that the computation is done on a sphere, using the semi-major axis of the ellipsoid.
What is WGS84 pseudo Mercator?
Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator 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.
How do map coordinates work?
The geographic coordinate system consists of latitude and longitude lines. Each line of longitude runs north–south and measures the number of degrees east or west of the prime meridian. Values range from -180 to +180°. Lines of latitude run east–west and measure the number of degrees north or south of the equator.
Why does Google use Mercator?
A Google employee explained in 2009 that the company used a Mercator map because it helped preserve angles of roads: “The first launch of Maps actually did not use Mercator, and streets in high latitude places like Stockholm did not meet at right angles on the map the way they do in reality.”
What type of projection is WGS 1984?
For example, the “WGS84 projection” is a geographic one. A UTM projection is a projected one. Either of these will use only one datum. However, the data on the map could have come from multiple sources, all with unique projections and therefore datums.
Is WGS84 the same as Web Mercator?