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Examples: GB grid: SJ
64984 52390, Irish grid: H 08018 38081, UTM: 30T 452420 4797239, Lat/Long: 52.69414 -3.08716 or N52.69414, W3.08716
Digits in NGR:
Point required (use formats above):
Grid refs can have 2 to 5 digits but point entered must have leading
zeros and match the digit level, e.g. digits = 4, ref = SJ 0123 4567. UTM must be separated by spaces. Lat/Long can also be: 52.1 (degrees) or 52 30.5 (degs mins) or 52 30 30.4 (degs mins secs)
+ If entering grid refs in numerals, make sure the ref is in metres e.g. 300000 400000
+ Make sure a UTM ref has letter/number zone then numbers with easting
and northing, all separated by spaces. Map Datum is WGS84.
+ Use negative lat/lon if required but do not use letters at
the same time..
+ In UTM & lat/long references, the space can be replaced with a + sign.)
+ Lat/long in dm or dms format should be separated by
spaces, e.g. 52 30.5 -2 10.3