Advantage of using RTK/PPK in drone survey

Advantages of using RTK/PPK in drone surveys

Advantage of using RTK/PPK in drone survey

Norbert Plate

by Norbert Plate, iQlaser (Pty) Ltd

iqlaser.co.za

SA GeoTech 2017

Advantages of using RTK/PPK in drone surveys

Advantages of using RTK/PPK in drone surveys or

how to achieve survey grade accuracy

Norbert Plate

iqlaser.co.za

SA GeoTech 2017

Advantages of using RTK/PPK in drone surveys

Drones (UAV's, RPAS) usually do use a standalone GNSS receiver (sometimes only a GPS receiver) enabling the drone to navigate safely

While a standalone GNSS/GPS receiver is able to achieve a satisfactory accuracy for safe navigation, the overall accuracy which can be achieved is far away from what we call `survey grade accuracy'.

Norbert Plate

iqlaser.co.za

SA GeoTech 2017

Advantages of using RTK/PPK in drone surveys

In order to correct the positioning error in drone surveys so called `ground control points' or GCP's are used.

GCP's are points which are visible in the images and where the exact location (longitude, latitude and elevation) is known.

While the correct use of GCP's does provide survey grade accuracy, there are a few `draw backs':

- GCP's needs to be placed and surveyed before the flight, defeating the `data on demand' advantage

- Depending of the size of area the number of GCP's can go into the hundreds, making the whole process very time consuming (and it will add costs!)

- GCP's which are placed wrong (wet surfaces, long grass, etc) will not work and will not deliver the desired accuracy. If not checked this will be most likely not detected.

- GCP's can move (weather impact) or disappear (never use GCP's made out of wood winter time!

- Etc.

Norbert Plate

iqlaser.co.za

SA GeoTech 2017

Advantages of using RTK/PPK in drone surveys

Including techniques such as RTK (real time kinematic) or PPK (post processing kinematic) will:

- Eliminate the need for GCP's, therefore reducing costs tremendously - Reduce possible human error's - Achieve survey grade accuracy for the mapping/survey project - Bring back the `data on demand' advantage - Makes it easy to proof accuracy by using a couple of check points

(different survey method used!)

Norbert Plate

iqlaser.co.za

SA GeoTech 2017

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download