Joel van Cranenbroeck
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Joel van Cranenbroeck's Discussions

RTK and POST-PROCESSING GNSS for free

Started this discussion. Last reply by Tim Durham Oct 10, 2018. 16 Replies

I would like to start that discussion about the Open Source software RTK-LIB that allows anyone to post-process GNSS observations (RINEX) for free and also to perform RTK (RTCM).It seems UAV…Read more →

Tags: OPEN, SOURCE, SOFTWARE, PROCESSING, POST-PROCESSING

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Joel van Cranenbroeck's photo was featured

GNSS T300 RTK UKRAINE

Andrey Balan is GNSS RTK geodetic points in Ukraine to control check new new GNSS Network RTK corrections.
Jan 3
Joel van Cranenbroeck commented on Tariq Brown's blog post WHY GPS IS NOT PERFECT
"Yep but Total Station has also lot of imperfection : mechanical axis errors, EDM calibration, verticality, instability of the tripod, refraction, etc, ... the question is not the error budget but well how surveyors can mitigate and compensate by…"
Dec 28, 2018
Joel van Cranenbroeck commented on Domingo Palnac's photo
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High Rise Surveyor Dubai

"The difference is on the way surveyors can re-invent their methods ! "
Dec 28, 2018
Joel van Cranenbroeck commented on Domingo Palnac's photo
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High Rise Surveyor Dubai

"Good to see a picture at top end of the Burj Khalifa ! Have been there and invented the Core Wall Control Survey method combining TPS and GNSS PPK for the first time in high-rise building industry ! "
Dec 28, 2018
Joel van Cranenbroeck's 2 blog posts were featured
Dec 27, 2018
Joel van Cranenbroeck's discussion was featured

RTK and POST-PROCESSING GNSS for free

I would like to start that discussion about the Open Source software RTK-LIB that allows anyone to post-process GNSS observations (RINEX) for free and also to perform RTK (RTCM).It seems UAV hobbyists and robots makers are more familiar than surveyors with the RTK-LIB. That library has been developed by Mr TAKAZU from Japan. RTKLIB is an open source program package for standard and precise positioning with GNSS (global navigation satellite system). RTKLIB consists of a portable program library…See More
Dec 25, 2018
Joel van Cranenbroeck's photo was featured

FIRST SMART STATION SHOWED IN CHINA

In China they already had the idea to combine Total Station and GPS/GNSS and when Leica Geosystems released the first SmartStation, we took one in China before even the official release to let them enjoy the performances in the Kunming CORS network.…
Nov 12, 2018
Tim Durham replied to Joel van Cranenbroeck's discussion RTK and POST-PROCESSING GNSS for free
"That is correct.  It is post processed data.    You need to log the ReachRs for at least 20 minutes.  If you get it out and start logging as soon as you get the job site to fly, then it can be logging while you are flying and…"
Oct 10, 2018
Paul Burke replied to Joel van Cranenbroeck's discussion RTK and POST-PROCESSING GNSS for free
"Thanks for the fast reply Tim. So is it post processed base data so you have corrected map co-ordinates? Or it just converts the LLH to a local co-ordinate file? Cheers."
Oct 10, 2018
Tim Durham replied to Joel van Cranenbroeck's discussion RTK and POST-PROCESSING GNSS for free
"Paul,  The EZsurv is GREAT.  It now takes me about 2 minutes to process my Emlid Reach RS surveys and then export the CSV file for Pix4D.  I highly recommend EZsurv.  They now have a utility that converts the ReachRS survey file…"
Oct 10, 2018
Paul Burke replied to Joel van Cranenbroeck's discussion RTK and POST-PROCESSING GNSS for free
"Tim, I have also got a set of Reach receivers to use in a base/rover setup for GCP's for my little drone company. PSA - I am a surveyor for more than 30 years and understand the pain of getting post processing right. The problem I have is…"
Oct 10, 2018
Joel van Cranenbroeck's 2 photos were featured
Aug 10, 2018
Joel van Cranenbroeck's blog post was featured

THE DEAD END OF THE TRAVERSE METHOD

One of the typical survey method for determining station's points and survey details has been the traverse method. There have been considerable discussions on the way to "adjust" angles and distances and lot of rules of thumb while rigorous Least Squares Adjustment softwares are available anywhere.I would say "too much" talks and controversial exchanges for a method that is simply not appropriated anymore considering modern instruments. Long traverses (geodetic) have been anyway replaced by…See More
Jun 1, 2018
J Keith Maxwell favorited Joel van Cranenbroeck's photo
Apr 3, 2018
Joel van Cranenbroeck's photo was featured

Beidou in 2008 ! The very first Beidou Receiver I got in hand in Beijing

I was over excited to get in hand that very first Beidou GNSS receiver that has been used for recovery people after the terrible 2008 Weishuan Earthquakes in Sichuan Province, China
Mar 29, 2018

Profile Information

I am here because I am a.
Professional Land Surveyor
Surveyor Bio:
Have been graduated in 1982 in Belgium. In April 2017, I have been awarded by the title of Professor Honoris Causa from SSUGT, Russia for my significant contribution in the field of Engineering Geodesy. In between ? Just passion and great opportunities to meet great surveyors worldwide and work with them.
Company
CGEOS - CREATIVE GEOSENSING
Location for Member Map
Belgium
Licenses Certifications or Awards
Professor Honoris Causa
I have experience with the following
GPS, cadastral, topographic, boundary surveys, construction staking, topographic surveys, control network surveys, ground movement monitoring, GIS, teaching, Survey Office, Equipment Sales, Software Development, Construction, Seismic, Other, UAS/UAV Drone Technology, I Teach Surveying, I sell surveying equipment, i am a software developer
How many years have you been surveying?
35
Most comfortable with the following types of instrumentation
Total Stations, GPS, Surveying Software, Robotics, Automatic Levels, GNSS, Machine Control, theodolite, UAS/UAV Drone Technology

Joel van Cranenbroeck's Photos

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Joel van Cranenbroeck's Blog

FROM BASE STATION TO GNSS NETWORK ... HOW DEPENDING ARE YOU ON POSITIONING INFRASTRUCTURES ?

Posted on February 2, 2018 at 11:52am 0 Comments

Most of the GNSS Network RTK projects have been developed by the economical justification that an active geodetic network would reduce the cost of maintaining a traditional geodetic network where the maintenance of the benchmarks and the control survey were a significant part of the ownerís budget.…

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UNCERTAINTY ON SURFACE/VOLUME CALCULATIONS

Posted on January 29, 2018 at 9:38am 2 Comments

When I started my career, I have been attracted by one (of many) question : how accurate is the surface/volume calculations knowing the uncertainties of the points that define these geometrical figures. I really wanted to know in term of standard deviation what would be the "end results".

The solution was to propagate the variances (standard deviation squared) into the functional model (the…

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SOFTWARE FREE BUBBLE GNSS ROVER RTK

Posted on January 27, 2018 at 11:38am 0 Comments

Good news for all of you who are using a GNSS RTK without the fancy tilt meter and IMU onboard ! 

You can turn your today GNSS receiver to do the "free bubble style" by mixing up 2 technologies that popped up last year.

The first one is about software receiver as we learnt we can feed the digital signal…

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THE DEAD END OF THE TRAVERSE METHOD

Posted on January 27, 2018 at 11:29am 0 Comments

One of the typical survey method for determining station's points and survey details has been the traverse method. There have been considerable discussions on the way to "adjust" angles and distances and lot of rules of thumb while rigorous Least Squares Adjustment softwares are available anywhere.

I would say "too much" talks and controversial exchanges for a method that is simply not appropriated anymore considering modern instruments. Long traverses (geodetic) have been…

Read more →

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At 11:30am on February 11, 2018, Fadi said…

Dear Joel

 it was a great  time and honor to me  when we meet 

because no one will be thirsty from your Geodesy river after meeting you.

i am fine thank you and i will try to help young surveyor here .

 
 
 

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