It will work out your Maidenhead locator if you supply it with map references or calculate map references from your locator code. You can use the list, to estimate the location, if you hear a station on the band who's locator you do not know. You can either enter your QTH locator and find the calculated distance and bearing between your QTH and another grid square. This map allow just a point and click to determine dynamically the correct six characters locator. Other functions allow to calculate the distances among two given locators, or coordinates. Map is powered by Bing Maps.
Amateur Radio Maidenhead Grid Square Locator Map
Ham Radio Maidenhead Grid Square Locator Geocoding with Google Maps by HA8TKS
The Maidenhead Locator System a. The Maidenhead Locator System can describe locations anywhere in the world. Maidenhead locators are also commonly referred to as QTH Locator , grid locators or grid squares , although the "squares" are distorted on any non- equirectangular cartographic projection. Amateur radio contests on VHF and UHF are often scored based on the distance of contacts , typically 1 point per kilometre,  so there is a need for amateurs to exchange their locations over the air. To facilitate this, following the growth of the sport in the s, the German  QRA locator system was adopted in The QRA locator system was limited to describing European coordinates, by the mids there was growing need for a global locator system.
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The Grid Square Locator, also known as the Maidenhead Locator System, is a geographical co-ordinate method based on a 6-digit code, widely used by amateur radio operators to determine a rough position on the Earth. The grid locator system is one of the many peculiarities that characterize the amateur radio world, and of which all radio amateurs are or should be aware. Not all radio amateurs, and especially the youngest ones, however, do not know the history of the birth of this clever, although crude, method of calculating position on earth. Here we will try to recap the history and the origin of all these names. The current Grid Square Locator System, as we know it today, is the evolution of a previous method, invented in the late s with the goal to help in calculating scores for VHF contests.