Different parts of the globe move relative to each other with velocities up to ten centimeters yearly. The secondary reason lies in the tectonic plate motion, which results in the movement of some parts of the world. It cannot also fit the non-geocentric ellipsoid used for mapping that country. Since the World Geodetic System has been designed to best fit the Geoid of the Earth as a whole, it cannot fit the Geoid in a particular country. The primary reason, that differentiates WGS 84 coordinate system from any other local coordinate system is the accuracy.
1 Equatorial ( a), polar ( b), and mean Earth radii defined in the WGS 84 (). 1) with an inverse flattening of 1/298.25722. The basic parameters of the WGS-84 are shown in the image below (Pic. The origin of the WGS 84 datum is the center of the mass of the Earth (Geocenter). It consists of a three-dimensional Cartesian coordinate system with an associated ellipsoid, which means, that the positions can be described either in XYZ or Latitude and Longitude. It’s a standard coordinate system for the GPS system. WGS 84 is the latest version of the World Geodetic System (WGS), which is standard for use worldwide and uses the GRS 80 reference ellipsoid.
Before I start to show you how it works I would like to explain to you what is the difference between WGS 84 and the OSGB 36 coordinate grid system. In this article, I am going ahead with the solution, which will help you save time in batch Latitude/Longitude to OSGB XY conversion and another way round. However, even there, you are too involved, since the data must be pasted from our Excel file and then copied back to our spreadsheet. Fortunately, we have some tools, which can do the job for us. This task might be quite time-consuming when converting our locations one by one. Usually, along with the standard WGS 84 datum, we need to define X (Easting) and Y (Northing) coordinates. The Ordnance Survey grid conversion is usually required when dealing with some projects across the UK.
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