A technique of obtaining precise measurements form images. From picture element. Positional Accuracy Positional Accuracy is an estimate of how close the representation of a spatial object is to the true location of that object. A systematic construction of features on a plane surface to represent corresponding features on a spherical surface. Obtaining information about an object or phenomenon without direct contact.
Space is a geographically bounded region in two or three dimensions.
Two-dimensions define an area. Three dimensions define a volumetric area. The collective features of the surface of the Earth, including relief, hydrography, and cultural features.