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I have a qGIS question regarding the calculation of x and y coordinates and showing the results in decimal degrees. Initially I was using the 3.2 version, but went back to the 2.18.13 version because the newer version was really off for the coordinates (it would return 40.7768, -65.7466 when hovering over a point that was closer to 38.78, -76.87, for example). The 2.18.13 version of qGIS seems to be giving the right coordinates when hovering over a point, but when calculating them into a new field, the results returned aren't in decimal degrees (i.e. 1343104.31085 for x and 531546.19274 for y). The layer is set to a CRS of NAD83 HARN (EPSG:4269 (OTF)). Is there a conversion factor that should be used? I have tried saving the dataset as a shp file (it was already), adding fields and calculating using $x and $y, and I have also used the toolbox to add geometry, and receive the same results - not in decimal degrees. Any advice?

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    Possible duplicate of How to convert UTM coordinates into Decimal Degree coordinates? – lambertj Jul 20 '18 at 18:11
  • The layer looks like it's using EPSG:26785, NAD27 State Plane Maryland (in US survey feet). @lambertj not a duplicate of the UTM question. – mkennedy Jul 20 '18 at 18:31
  • I tried EPSG:26985, NAD83 State Plane Maryland to do the same calculations, but was unsuccessful, however, it may have been a permissions issue, since when I saved the shapefile again to another name and set the CRS to NAD83 HARN (EPSG:4269 (OTF), and redid adding the fields and calculations, it worked and returned the coordinates in decimal degrees. Thanks – Robin O'Hara Jul 20 '18 at 18:37
  • Good to hear that worked for you, Robin. You should post your solution as an answer and accept it. May help others down the line. – lambertj Jul 20 '18 at 19:02
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It may have been a permissions issue, since when I saved the shapefile again to another name and set the CRS to NAD83 HARN (EPSG:4269 (OTF)), and redid adding the fields and calculations, it worked and returned the coordinates in decimal degrees.

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