[Qgis-user] Question on Project Properties - Ellipsoid

[Randal Hale]

I hope everyone is staying safe out there.

So I've had some questions regarding setting up a QGIS Project and now 
I've convinced myself that I'm doing this wrong. When I get a new 
project in and I start setting up QGIS generally my project will be in a 
Stateplane projection - in this case EPSG:2274 (TN Stateplane NAD83). 
When I set up the project I change the ellipsoid to be 
"none/planimetric" (In the project properties). I don't set up the 
ellipsoid to be GRS 1980 and haven't for some time. Now I'm getting a 
ballpark transformation message if I move data from 2274 to 4326 (for 
instance I'm moving points to a GPX Format).....BUT - if I set the 
Ellipsoid to be GRS 1980 (which it is for that projection) - no warning. 
Which now has me thinking MAYBE I should set the ellipsoid..... EXCEPT 
my area measurements always come out a bit larger than expected. So I go 
back to "none/planimetric".....BUT - is that causing issue with 
reprojecting data........

Any thoughts? Thanks for any support or pointing me in a direction.

Randy

-- 
Randal Hale
rjhale at northrivergeographic.com
(p) 423.653.3611
http://www.northrivergeographic.com