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custom projection issue and adding data

Question asked by Nigel312 on Aug 16, 2017
Latest reply on Aug 17, 2017 by Nigel312

Hi all,

I am not great with projections and I have some data I need to correct.   I am doing work for St. Kitts and Nevis (Caribbean) and the data I got from them has a custom projection.   I asked them for information on it to try to convert it back to something mainstream so I can then use ArcMap to then transform it and was told the custom projection was WGS 1984.

I then converted some lat / long data into decimal degrees and added it to the map.  The resulting points were almost 2 million metres off.  This figure correlates to the massive extent range that the custom projection has (pic attached).  Also, the custom projection shows a GCS of "GCS_North_American_1983", which does not match what they told me. 

I have been attempting to fix this for days now by reading others questions, so any help would be appreciated.

Thanks,

Nigel

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