RTK Surveyor + SW Maps

Kits
1

Hello - hoping someone can help me with an elevation “issue” I seem to be having. I ordered and received two RTK surveyor kits w/telemetry radios several weeks back. Today I brought one into the field to check the accuracy against a known local control point at a job site.

The elevation measurement is off by about 90ft. my antenna is on a standard 2m pole and I’ve entered the correct instrument height. SW maps at the time estimated the error to be about 10-12 inches, which is what I was expecting it to be. Just surprised that it reads 90 feet off a known point.

Assuming the surveyors control point is correct, what could my issue be? I think this may be something to do with ellipsoid vs ortho height/elevation but admittedly I’m not a surveyor so not confident in this conclusion. If it is that, is my issue solved in SW maps or is this a setting with the RTK surveyor unit?

To further complicate matters, what if I had gone out and set my basestation up over that control point, entered the coordinates and elevation provided to me for that CP, and proceeded to use my Rover to take measurements?

Thanks in advance!

2

I’d normally point ya to this https://docs.sparkfun.com/SparkFun_RTK_ … ification/ to run through…90 feet is a lot, though :-/

Double-check the ARP offsets and make sure there aren’t any typos…is it only the elevation that doesn’t match up?

3

I am having this exact issue! By almost the exact margin. Any help would be greatly appreciated. I have excellent accuracy with LAT/LON

4

RyanJ_17:
Hello - hoping someone can help me with an elevation “issue” I seem to be having. I ordered and received two RTK surveyor kits w/telemetry radios several weeks back. Today I brought one into the field to check the accuracy against a known local control point at a job site.

The elevation measurement is off by about 90ft. my antenna is on a standard 2m pole and I’ve entered the correct instrument height. SW maps at the time estimated the error to be about 10-12 inches, which is what I was expecting it to be. Just surprised that it reads 90 feet off a known point.

Assuming the surveyors control point is correct, what could my issue be? I think this may be something to do with ellipsoid vs ortho height/elevation but admittedly I’m not a surveyor so not confident in this conclusion. If it is that, is my issue solved in SW maps or is this a setting with the RTK surveyor unit?

To further complicate matters, what if I had gone out and set my basestation up over that control point, entered the coordinates and elevation provided to me for that CP, and proceeded to use my Rover to take measurements?

Thanks in advance!

Did you find a solution?