I am working in an project.I have a point Shapefile its projection is NAD83(HARN)Pennslyvaniasouth(ftUS)*EPSG3365* when I measure its distance(between two points) it gives me the answer in feet .yes its acceptable for me.I also calculated its x-coordinate and y-coordinate for the points in field Calculator it displays me the answer in feet.This is the problem.In my company they are insisting me to show the LAT-LONG value in Decimal Degrees.Is it possible to show the Lat-long in Decimal degrees in QGIS?
I think transform() function was not available when the question was posted (Y2013).
Now we can solve this CRS issue, just by the Field Calculator!
For Longitude: ......
x(transform($geometry, 'EPSG:3365', 'EPSG:4326'))
For Latitude: .........
y(transform($geometry, 'EPSG:3365', 'EPSG:4326'))
I created three random points near Philadelphia, and the transform() worked as expected. (Imported to GoogleEarth as KML and made a visual check).