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Same projected and geographical co-ordinate system, different extents.

Question asked by ashsha1 on Dec 1, 2017
Latest reply on Dec 8, 2017 by cdspatial

Hi All, 


I'm just struggling to align these co-ordinate systems up in ArcMap.


One is the ITN Network Dataset all prepared which is on a British National Grid Projection.

The other is a CSV with lat/long coordinates which is also imported using the XY Data and projected it as a British National Grid Projection.

They simply won't line up and I have tried exporting it as a .shp file, reimporting and then reprojecting as well as using the "Define Projection" tool.

One thing I have noticed is the extents are hundreds of thousands of meters off, however I've been trying to google stuff and haven't come to much luck. 

I don't know if anyone has a suggestion but I thought i'd ask just in case. 

Excel Files are attached. Unfortunetly the ITN network file is over the allowance. The pictures show the locaiton of the cycle points (small red dot) and the ITN map (green dots) Hopefully you can access these if you do want to see my issue.

Thanks in Advance,

Kind Regards