Hi all. First post so apologies as it is a long one. I am just unable to find this answer independently.
I have a drone business in remote NW Australia and purchased 2 x Emlid RS+ to capture accurate Ground Control Points. I have only used a borrowed Trimble previously which had Satellite RTX positioning and would also capture points in whatever CRS I desired….I thought I knew what I was doing. Knowing some of the terminology and processes does not wisdom make!
I really only have 2 workflows I need to get right, but I am noticing that I don’t have a grasp of some of the basic fundamentals around Coordinate Reference Systems to know if I am capturing the points correctly combined with a little confusion around the Reachview 3 workflow.
I need to either
a) Position my base over a known State Survey Mark (supplied in GDA2020) or other known point and capture GCP’s with the Rover, output to be in GDA2020 or;
b) Position my base using an NTRIP transmitter for RTK fix and then capture GCP’s in GDA2020
I understand how to connect Base/Rover etc. Where I fall down is the coordinate system and how to leverage the data I need from Reachview 3.
My questions are
- What CRS does the Emlid RS+ display when just using satellite for a fix? Is it WGS84? Which EPSG code?
- What CRS does the Emlid RS+ display when using NTRIP RTK? Is the CRS of the NTRIP station relevant?
- If I start a project on my rover using Reachview 3 and select coordinate system as GDA2020 then will it automatically get that correct regardless of the base stations CRS fix, or
- Is the only time I can select GDA2020 as the CRS for point capture when I have manually entered a GDA2020 point in the base?
Can anyone share a workflow for positioning the base over a known point with a known CRS and then obtaining your marks in the desired CRS, same or otherwise. No doubt I’m missing some basic fundamental.
Thanks in advance for anyone who can help.