How to combine GNSS RTK survey data & Total Station data into one topo survey

We have been using RTK survey solutions and Total Station survey separately on topos but now wish to combine the two techniques into the same survey, to leverage the strengths of both these solutions.

I'm looking for advice or a start point for investigation on how to accomplish this.

Kind regards

Ian 

This Content Originally Published by a land surveyor to Land Surveyors United Network

Views: 831

See Your Saved Posts Timeline

☇ Reply to this

Replies to This Discussion

My experience is probably short sighted. Nevertheless here it goes. Whenever I choose a RTK solution my main concern is to have total connectivity with the TS. I had to work with separate and isolated solutions and i met difficulties, lost or duplicated data. Today I use a topcon gpt8003 with south v82 rtk. Works fine with a stonex s4 controller with survce 4.
Need more info. Are you asking how to make the equipment talk to each other or how to deal with scale factors, etc?

Yes Pat, separate equipment but the data collected combined into one topo survey.

Thanks

Ian

I'll dig through my previous blogs - but I  think this very topic was hashed out a few months ago.

Hi Kevin, what does hashed out mean?

Cheers

Ian

?? Hashed out?? - debated, talked about, discussed and more or less resolved 

Ian, what has made life a bit easier for me in combining RTK and TS field data is to be certain you are using the same control points, best efforts being that you measure to at least three control points prior to stating your survey and by measuring to at least three control points at the end of the survey. If for some reason you are not happy with the measured results, you can run down the errors before collecting a lot of data that has to be adjusted at a later time.This technique can be a quick check to be sure that each type of sensors you are using (GPS or TS) have the same settings/configurations for the project. As you may know, vertical measurements (elevations) are some of the most difficult field measurements to match between RTK vs Total Station are even from a level run.

Thanks for you reply Robert.

The advise you guys are providing has allowed me to understand it's possiable to combine the data.
The reason I'm asking is that although RTK is fast and accurate for our needs, sometimes we can't get onto ajacent properties or are in an urban canyon where GNSS is unavailable. In these circumstances, we would use the Total Station, however in more open survey sites we can complete the survey using RTK alone. 

There is an option of Integrated Surveying using a conventional instrument and GNSS. I know you can do this with a Trimble instrument and GNSS. Please see below from Trimble Survey help:

Integrated surveys

Using an integrated survey (IS) allows you to connect to both a GNSS receiver and a conventional instrument at the same time.

You can perform an integrated survey using Trimble servo total stations and RTK surveys.

The truth is that the two equipment cannot talk to each other but the data each acquired can be married together to give a result. All you need to do is to make sure that the have the same projection. Total station works with the principle of intersection i.e occupy the known to get the unknown. i will advice u use the DGPS to establish the known point (control) to enable the total station to take off and since its a topo, survey try and minimize the no of instrument setup thanks

All other points aside, I'll add (maybe repeat) the following

1) If you are not using a data collector that can run both systems - GPS/RTK and Terrestrial / Total Station equipment, ( unplug the GPS and plug into your TS on the fly) you need to take a hard look at how you are investing in and operating your survey business.  That was the final determining factor when I selected my first GPS system back in 1998 

2) A Point is a Point - it should not matter if you obtain, occupy or establish a control point via GPS or Total Station if you have the proper procedures in place.

3) Some of us obsess over point quality - its been my experience that more than 95%(?) of any point error falls within standard allowable spec'd tolerances.  The other 5% is human operator error ( sometimes called UTS errors) and no data collector mode, GPS setting or Total Station/EDM calibration is going to correct for untrained or under trained field crews and techs.

RSS

Where Thousands of Professional Land Surveyors, Students of Surveying and Educators are United through Collaborative Knowledge and Purpose.

Land Surveyors Forum

Survey Abstract Coordinates

Started by John J Rodriquez in Introduce Yourself to the Community. Last reply by Carlo Alberto Birocco 5 hours ago. 14 Replies

Control surveying problem

Started by shree ram bhandari in Land Surveying Jobs. Last reply by Billy Brooks on Saturday. 11 Replies

Magnetic North Update

Started by Billy Brooks in Surveying Best Practices. Last reply by Billy Brooks Feb 6. 2 Replies

AERIAL STEREOSCOPY

Started by Lalith Senanayake in Surveying Related Links. Last reply by shree ram bhandari Feb 12. 4 Replies

Job Quotation

Started by Nitesh Shrestha in Land Surveying Jobs. Last reply by Nitesh Shrestha Jan 21. 3 Replies

Survey under tree canopy

Started by Massimo in Surveying Best Practices. Last reply by Maurice Heter on Saturday. 7 Replies

Mean Sea Level (MSL)

Started by Chuck Turlington in Geospatial Industry Types. Last reply by Kim Noblitt Jan 17. 6 Replies

Surface pro

Started by Malik in Surveying Field Tips and Tricks. Last reply by Kevin D. Allen Jan 7. 5 Replies

ROOF PEAK SURVEY

Started by Mthulisi Mloyi in Professional Advice for New Surveyors. Last reply by ⚡Survenator⌁ Jan 4. 2 Replies

Tools,Apps and Quick Guides

DEDICATED TO THE MEMORY OF SKIP FARROW (1953-2015)


Help With Survey Equipment

Social Support For Equipment

Surveying Video Categories

Surveying Photo Categories

United States Hub Forums

International Surveyor Hub Forums

Resources for Company Owners

Land Surveyor Social Media

Surveyor Resources Collections

Getting Started & Newsletter

Featured Land Surveyor Hubs

Surveyor Birthdays

© 2019   © Created by Land Surveyors United   Powered by

Badges  |  Contact LSU  |  Privacy Policy  |  Terms of Service

Site Explorer