[Qgis-user] How to define which CRS to use?

[Nicolas Cadieux]

What if the coordinate where in feet instead of meters?  Where does that put you? I would also look at local coordinate systems to see what they use. 
Nicolas Cadieux M.Sc. 
Les Entreprises Archéotec inc.  
8548, rue Saint-Denis Montréal H2P 2H2 
Téléphone: 514.381.5112  Fax: 514.381.4995 
www.archeotec.ca 
On Apr 29, 2015 12:14 PM, "Joris Hintjens [via OSGeo.org]	" <ml-node+s1560n5203528h29 at n6.nabble.com> wrote: 

	Hello,
I have a csv file with a list of coordinates. for example one of them:
X	Y
12374462.4355	4877977.8396
notice the (to me at least) strange X coordinate: in the 12millon range.
I know the point should land somewhere near the Kazach town of Shalkya, with coordinates in the EPSG3857 (WGS 84 pseudo mercator) of +/- X: 750800 Y: 5472000 
If I start at 0 lat and 0 long, I’m off about 5000KM.
How can I define which sourceCRS to use? How to treat this dataset for further use?
Thanks for any suggestion.
Joris
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