Location-Based Marketing Association (LBMA)

A trade association that promotes the use of location-based marketing techniques.

Longitude

The angular distance east or west of the prime meridian, measured in degrees.

Map

A map is a two-dimensional, graphical representation of a three-dimensional area. The surface of the Earth is projected onto a flat surface, using a map projection.

Map projection

A map scale indicates the relationship between the distance on the map and the corresponding distance on the ground.

Map scale

The Marine Environmental Data and Information Network (MEDIN) is a UK-based initiative that aims to improve the accessibility of marine environmental data.

Marine Environmental Data and Information Network (MEDIN)

MEDIN has established a metadata schema to standardise the description of marine data sets.

Meridian

A meridian is a line of longitude, running from the North Pole to the South Pole.

Metadata

Metadata is data that provides information about other data.

Metadata schema

A metadata schema is a set of rules for how metadata should be structured.

Mobile Advertising ID (MAID)

A unique identifier that is assigned to a mobile device for the purpose of tracking mobile advertising.