Ground Coordinates

Donald E Robinson

Active Member
How can I tell if I am receiving State Plane Coordinates or Ground Coordinates. There use to be a setting, but it was moved somewhere during Justin updates. I don't know where it is anymore or its current setting. Is there an icon that changes when it is converting points to ground coordinates?

Thanks in advance for any input.

Don
 

Nate The Surveyor

Well-Known Member
In a way, your question reveals the pure joy of using the LS.... You can set a page to be:
(This is one of my examples)
Page 0 is Arkansas SPC south Zone.
Page 1 is a sort of localize, to an existing survey, that I did in the field, to assist in searching. It is not very reliable, and is just a tool for searching....
Page 2 is an arbitrary 50k/50k local system, with a CSF of 104 ppm NO rotation.
Page 3 is Arkansas SPC NORTH Zone.
Now, I can set ANY page current, and import, or export in whatever paremeters I have set.

Now, having said all that, YOU are in charge, of what you want IN, and what you want OUT.
IF you are not comfortable, with all that power, get some help. It is literally awesome. I cannot seem to think of going back.
I really like it. I hope this helps.
Nate
 

Adam

Well-Known Member
5PLS
Also, in collection you can set a white box as coordinate system. It will show you what the current system is.
 

Matt Johnson

Well-Known Member
5PLS
Have you reviewed the information in the Quick Start Guide about coordinate systems? All surveyed coordinates in J-Field are stored in the database in WGS84 (ITRF 2008). J-Field then transforms and displays the coordinates to the coordinate system of the current page.
 

Nate The Surveyor

Well-Known Member
If you feel lost, with all the data, and decisions thrown at you, get somebody better at this than you to make visuals, of whats happening.
I do a drawing, showing a ball, with a flat spot, that is at sea level elev. This is the State Plane system. Grid to ground scale factor is 0 where it intersects the plane. Then, I make little mushrooms, where the plane is below the surface, and we have come UP to ground. And, inverted mushrooms, where grid is ABOVE ground. These little local systems, are great, if you don't move too far away from the origin or stem of the mushroom.
then, I make another plane, which is inclined at another angle, (different origins) to depict it. After an hour or two, looking at this, it all falls in place, for many folks.
Internally, the native system the LS runs with is Lat Lon, so that data can be EXPRESSED in many different forms, That is one of the finest features of the LS. (My totally unbiased opinion!)

N
 
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