Convert OS To Lat Long|工具線上App不用買

Convert OS to Lat Long is a simple Android app which does an offline conversion of Landranger OS coordinates to Latitude Longitude. It is aimed for use principally by hill-walkers and ramblers. Starting points for walks in Britain are usually specified in OS coordinates. Car sat-navs tend to accept Lat Longs but not OS Coordinates.

Once installed on the Android device, the app is simplicity itself to use, just key the OS Coordinates into the text box (the 2 letter prefix is not case sensitive) and press Convert. The Coordinate will then be displayed as a Lat Long. If the coordinate entered is not valid then an error message will be displayed.

It may be noted that there is an approximate 50m difference for any given coordinate, in the Lat Long produced by the app and that produced by the Streetmap website. The Streetmap website appears to take the mid-point between the specified Landranger coordinate and the next value up (ie: SU123456 would be 123.5 & 456.5). The app just takes the coordinate as specified by the user (ie: 123.0 & 456.0).

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