The network of the series of vertical and horizontal lines is known as

The network of the series of vertical and horizontal lines is known as Geographical Coordinates System. There are 2 co-ordinate values for a point latitude and longitude. A geographic coordinate system (GCS) uses a three-dimensional spherical surface to define locations on the earth. A GCS is often incorrectly called a datum, but a datum is only one part of a GCS. A GCS includes an angular unit of measure, a prime meridian, and a datum (based on a spheroid).