Abridged Molodensky transform

The standard way to convert coordinates from one datum to another is to first convert the coordinates to geocentric coordinates, then apply the datum shift and rotation parameters, then convert them back to geographic coordinates. As an alternative to this transform, the Molodensky formula implements directly a transform that is quite satisfactory for three parameter transformations.

accessor

A pair of methods, the getter method and the setter method, that are used to access the value of an object property.

affine transform

Affine transforms are commonly used in coordinate transformation. An affine transform is simply defined by a 4x4 double values matrix, and are applied to coordinates by multiplying them as if they were one 1x4 matrix.

AJAX

Asynchronous JavaScript and XML is a web development technique for creating interactive web applications. AJAX makes web pages more responsive by exchanging small amounts of data with the server behind the scenes, so that the entire web page does not have to be reloaded each time it is changed. This increases the web page's interactivity, speed, and usability.