1. A method for locating a mobile unit (M), supported on a surface of the Earth, using wireless data obtained for transmissions between the mobile unit M and one or more of a plurality of terrestrial wireless communication stations, comprising: receiving location indicative wireless data obtained from one or more wireless transmissions of two way wireless communications between the mobile unit M, and one or more of the communication stations; wherein the location indicative wireless data is for a plurality of wireless signals communicated to or from the mobile unit M, each signal, S, of the plurality of wireless signals: (i) has a different location from which the signal S is transmitted to, or received from, the mobile unit M, and (ii) for a portion of the location indicative wireless data for the signal S, the portion is dependent upon a geographic position of the different location for the signal S; obtaining a first location estimate for the mobile unit M from a first location technique, wherein the first location technique determines said first location estimate; wherein when the first location technique is supplied with input data obtained from at least one wireless signal transmission between the mobile unit M and one of the communication stations (CS 1 ), wherein by the transmission, the mobile unit M detects the communication station CS 1 , then the first location technique uses an area data representation for locating the mobile unit M, wherein the area data representation is indicative of a wireless geographical area within which the communication station CS 1 is expected to be detected by the mobile unit M; wherein the area data representation is obtained from an analysis indicative of wireless signals being transmitted by the communication station CS 1 and being detected at geographical locations effective for determining the wireless geographical area, the analysis performed prior to the first location technique being supplied with the input data; wherein the obtaining the first location estimate determines the first location estimate relative to a known stationary terrestrial location where the one communication station CS 1 is located when the wireless geographical area is determined; obtaining a second location estimate for the mobile unit M using a second location technique, wherein the second location technique determines said second location estimate using one or more occurrences of data obtained using the location indicative wireless data, wherein each of the occurrences is output by one or more pattern recognizers for estimating a location of one or more of the mobile unit M, wherein said second location estimate for the mobile unit M is dependent upon the pattern recognizers using data indicative of one or more patterns in multipath for wireless signals communicated between: (a) one or more of the communication stations, and (b) said mobile unit M; determining a resulting location estimate of the mobile unit M, wherein at least one of the following (i) and (ii) is performed: (i) determining which of said first and second location estimates is preferred for determining said resulting location estimate, and (ii) combining said first and second location estimates to determine said resulting location estimate; wherein the resulting location estimate identifies a likely location of the mobile unit M relative to one or more fixed positions on the Earth; and outputting said resulting location estimate of the mobile unit M.