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How to plot XY Coordinates in arcmap overlaid on a base map (satellite imagery)

Question asked by ShuhongYan on Jun 13, 2017
Latest reply on Jun 20, 2017 by ShuhongYan



My client sent me an excel file with XY data not in Lat Long format, but in XY Coordinates (e.g. x= 1705962, y = 12257736) and wants me to plot it in the arcmap with satellite imagery as basemap. How could I work on it?


I imported this Excel file to ArcMap by using File --> Add Data --> Add XY Data and then specify the XY fields. However, I don't know the Coordinate system. It did plot my data in the arcMap, but it is not matched with the Basemap.


I tried to use Define Projection to set up a Projected Coordinate System to it, but I don't know which one I need to use. I tried UTM or NAD 1983 in Projected Coordinate Systems but the result doesn't match with the basemap.


What should I do to plot the data in the Excel file overlaid with the basemap? Should I ask my client which Coordinate System they are using for the XY Coordinate?


I would really appreciate your help!