Martin Schmitz a écrit :
> Hi again,
>
> Your code works fine, but only for the latitude!?
>
> With your transformation code the UTM coordinates
> N 978077.7664007092
> E 334064.125
> result in
> lat: 8.8452338 degrees = 8 degrees, 50 minutes, 43 seconds
> lon: 7.4911148 degrees = 7 degrees, 29 minutes, 28 seconds
>
> But the manual conversion on
> http://www.ngs.noaa.gov/cgi-bin/utm_getgp.prl (with utm zone 31) results in
> 08 50 42.84189 N
> 358 30 31.98673 W
> which seems to be "more" correct, if I look at my world map.
The NOAA link above uses NAD83 or NAD27 datum. The EPSG:32632 code given by
Andrea uses WGS84 datum. You need to know in which datum are your UTM
coordinates ("UTM zone 31" is not enough - there is many "UTM zone 31" using
different datum), and in which datum you want your target coordinates
(8.8452338°N, 7.4911148°E is not enough; the same geographic coordinate may map
many different places on Earth depending the underlying datum).
Tries the NAD83 datum; it is close to WGS84.
Martin
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