Plus Code Converter

In short A plus code, formally an Open Location Code, encodes a position as a short string using a twenty-character alphabet — 23456789CFGHJMPQRVWX — chosen so that no code can accidentally spell a word in any language, and so that easily confused characters are excluded. The code is built in pairs, each pair narrowing the area by a factor of twenty: the first pair covers 20 degrees, the second 1 degree, then 0.05, 0.0025 and 0.000125. Beyond ten characters a finer grid of five rows by four columns refines it further. The plus sign always sits after the eighth character and carries no information at all; it exists purely so a code is recognisable at a glance and findable inside a sentence. The design point that makes plus codes genuinely useful is the short form. The first four characters narrow the world to about a hundred kilometres, so they can be dropped and replaced by a town name — "GV4C+XV London" instead of the full code. That is why plus codes work as addresses in places without street names, and it is also the commonest reason a pasted code fails to resolve: a short code without its town is genuinely ambiguous and cannot be decoded on its own. Like a geohash, a plus code names an area rather than a point; an eleven-character code is an area about 2.8 m tall and 3.5 m wide at the equator, narrowing further as you move toward the poles.