Hi
I use FME mostly for conversion of dwg/dxf/Shape files and changing their coordinate system with the help of GtransReprojector In Sweden all the county’s have different types like,
SWEREF 99 15.00, SWEREF 99 14.15 SWEREF 99 16.30 SWEREF 99 18.45 and so on
and we use SWEREF 99 TM
Sometimes I haven’t been told the source coordinate system and I have trouble finding (guessing) what it is
Is there a way that I can identify the source coordinate system with the data inspector or any other tool?
Hello @akeeri, have you tried CoordinateSystemExtractor?
hi
i tried it but there was nothing in the _coordsys table so i guessed it didnt work
thanks anyway
Hello @akeeri, have you tried CoordinateSystemExtractor?
Hi @akeeri got reminded here about the mysterious Swedish coordinate systems which we had to learn when providing airborne lidar data in the early 2000'nds 
As @chandan points out the CoordinateSystemExtractor will extract the values - if they are provided.
If they are not provided You will have to ask for the information, see if the system is described in other ways (report, text files etc). You could of course look here https://www.lantmateriet.se/sv/Kartor-och-geografisk-information/gps-geodesi-och-swepos/referenssystem/tvadimensionella-system/sweref-99-projektioner/
One technique could be to make a envelop, or something "light" from Your source data and do several (or iterate) CoordinateSystemSetters and with Reprojector compute lat/long's and then visualize it with some decent background map which should give the indication of which of the zones your data are (should be) related to.