Thread: What coordinates system is this please?

@mamamouchi
As a side note, it's not possible to convert standard UTM grid references without knowing in which of the 60 possible earth zones they're contained as well as whether N or S of the Equator. In the above case it's given by tli correctly as 52N, which can be deduced from the other information you've supplied: "Philippines, on Siargao Island, close to Dapa city". In fact when converted from UTM to Lat/Lon to 4 decimal places as 9.7367 126.0304 as shown and near enough 9°44'12.7"N 126°01'49.4"E, that point is in fact not all that close to Dapa City nor on Siargao Isl but about 2 or 3 kilometres roughly SW and in open sea, somewhat to the east of the northern-most point of Bacus Grande.

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I've forgotten more about that type of conversion than i can remember, but i think really such UTM conversions are only quite accurate for continental North Americas and NATO UTM is better used for Lat/Lon of the rest of the world. The NATO version has alpha codes as zones of Latitude compensating somewhat of the distortion when extrapolating the spherical data of the earth to a two dimensional rectangular representation, rather than simply N or S of the equator as does the standard version.

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