If I upload data to OPUS for the purpose of creating a new Known Point, does this information become public? If it does, and the Known Point is in a public space and marked, anyone can place a GNSS receiver over it and use it as their base?
You can upload data to OPUS and keep it private. That’s also the easiest way. Making data public involves a whole checklist of things that need to be done, such as data must neet certain criteria, pictures are taken, and a description must be written; a review process by NOAA is done; and if everything passes - a confirmation email showing you what is about to be made public that must be confirmed. It would be nearly impossible to accidentally make an observation public.
Like snillor999 said above, the standard option on OPUS is, the “No, don’t share” selection. Here are some of the requirements for sharing your solution, from the OPUS website.
- Upload your data file to OPUS
- After entering and verifying your antenna type and ARP height, click the
- For the option share my solution, choose Options >
- Your GPS data file must be 4 hours or longer.
- Your mark must be a permanent mark of public interest.
- The mark must be durable, have a stable setting, and good satellite visibility.
- Include a description and photos to help others find your mark.
- Your shared solution must be a high-quality solution:
- ≥ 70% observations used and ambiguities fixed
- ≤ 3 cm RMS
- ≤ 4 cm peak-to-peak error ranges for latitude and longitude
- ≤ 8 cm peak-to-peak error range for ellipsoid height
And you also have your receiver orientated correctly, among other SOP’s.
Here’s a tutorial link from their site.