🌐 Show Forums for All Locations

### Baseline - how to establish between base and rover Advice Needed

Good day all
I am not a surveyor but I play with GPS and specifically precision low cost units for precise positioning and navigation over dangerous terrain or for placement and remote control of machinery.
The question that I have is how is the baseline between the Base and Rover established (calculated)when RTK is in progress? Is it the horizontal distance or is it the hypotenuse?

In the above I have a Base at point A that is 10 meters away from the Rover at point B and it is also 10 meters higher. The receivers are precisely placed as indicated above.
What distance is calculated by the GPS as the Baseline?

Thank you

Sincerely

Anton

You need to be a member of Land Surveyors United - Global Surveying Community to add thoughts!

#### Replies

• Land Surveyor

The vector that is developed between the two receivers is 3-D, ergo, an hypotenuse.

However, the report in the controller is based on the user's prescription or other (default?) settings and so the vector displayed MAY be horizontal, i.e., 2-D.

The dimensions may also depend on whether the unit is set up to display results using a plane projection, in which case the distances and directions will be somewhat different than the geodetic values.

• What would you like me to expand on?

I am in the process of building an height (Z) adjustable rig to see when this "transformation" takes place

• Survey Legend

Tell us more...

Land Surveyor

### Land Surveyor Community Forum

Many if not most land surveying related topics are evergreen - meaning the topics of discussion are many times timeless.  If you have a question regarding Land Surveying in general, this is the place to ask your surveying related questions.

### How to Use Forums

How to use Forums
Our forums on Land Surveyors United are here to be used as much for finding help with problems in the field as the are for you to express your opinions on anything that has to do with land surveying in general. Feel free to share anything that is on your mind, as long as it isn't meant to damage another member's reputation. Please keep it clean and help insure that everyone has the opportunity to enjoy the benefits of being part of a community that grows together.

We are committed to allowing freedom of expression for all of our members, and that includes maintaining a safe space for people with opposing views to express themselves. We get posts from all over the country and even the globe, so needless to say, people come with different viewpoints on lad surveying practices and processes. We see this diversity and variety as a real strength-- dialogue and debate are an integral part of the educational process, as well as an important tool in exploring different sides of complex issues.

All Community Hubs inside the community have their own forum for asking specific questions to other surveyors, by location, equipment type, etc.