OSGB will only work for UK based locations surely. I missed where the questioner mentioned the country he wants to use, but I would have thought that UTM would be more likely to serve his purposes (assuming reasonably short distances are involved).

Update: I see that the original questioner has worked out the appropriate zone. For anyone else looking here let me explain what UTM is.

The US military needed a way to specify locations that would work wherever they operate (i.e. anywhere on the Earth). So what they did was split the world into 6 degree longitude slices and have a "Transverse Mercator" projection for each. So locations between -180 degrees and -174 degrees are in UTM Zone 1, -174 to -168 in Zone 2 and so on. New York, being at -74 is in Zone 18 (-78 to -72).

The other thing to notice is that there are different projections for locations North or South of the equator. So the final suggestion would be to use the zone "UTM18N"

In reply to Re^2: calculate distance in miles using Easting Northing coordinates. by hawtin
in thread calculate distance in miles using Easting Northing coordinates. by Anonymous Monk

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