Quan Le
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  • United Kingdom
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Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity

Started this discussion. Last reply by Quan Le Jan 6, 2016. 9 Replies

Dear allWe are developing a large-scale agriculture project in Nigeria (5,000ha) and started to use drones to survey and map topography.The intention was then to use the Digital Elevation Model for…Continue

 

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Latest Activity

Quan Le left a comment for Quan Le
"Many thanks for your advice Keeyen - hope we can work together somehow. Could we use some of your oil palm images you put online as demonstration of capability of UAV tech?"
Jan 11, 2016

Moderator
keeyen pang left a comment for Quan Le
"Dear Quan Le We do work with a few establish oil palm plantation here in Malaysia and Indonesia. Currently the most popular application for the drone data is palm inventory, road / drainage measurement, block area calculation ect. As for oil palm…"
Jan 11, 2016
Quan Le left a comment for Quan Le
"Dear Keeyen You are right the flying we can work with a number of providers. It is the processing especially for oil palm including looking at signs of stress that we will still need help on. Would you be able to work with us or point us to the…"
Jan 11, 2016

Moderator
keeyen pang left a comment for Quan Le
"Dear Quan Le Thanks for adding me. I read through your very interesting discussion and found quite a lot good info. As there are lot of great UAV company in that area and the fact that I'm base in Malaysia, it is unlikely or economical for me…"
Jan 11, 2016
Quan Le replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Hi Luke, saw you work in Uganda. please contact me at quan.le@gmx.com Best Quan"
Jan 8, 2016
Quan Le replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Yes, Paul, we will be doing it again next month or so when most vegetation would be have been burnt off by the scotching sun. Best Quan"
Jan 8, 2016
Jeff Taylor replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"The utility is an exe which takes as inputs the .tlog from a pixhawk powered vehicle and exports a csv with image names corresponding to GPS tags (lat, lon, alt). It's a PC application which would be run after the flight only."
Jan 8, 2016
Paul Meier replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"May I suggest you do the survey at the end of the dry season, there will be no grass and I guess you may be able to correct for the trees. Good luck"
Jan 8, 2016
Cedric Pieterse replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Nope. You can only rely on the hard surface. To get reliable ground surface points in the vegetation areas, you are going to need a VERY good LIDAR or the tried and trusted method of physycally measuring with RTK/Total station. Drones are not the…"
Jan 8, 2016
Quan Le replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Hi Cedric But any wild agriculture land will certainly include all type of vegetation. I guess through post processing/photogrammetry you can correct the distortion created by tall grass and trees?"
Jan 8, 2016
Quan Le replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Hi Darius we will reply with proper GCPs - There are still a lot area to cover. Best Quan"
Jan 8, 2016
Cedric Pieterse replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Hi Quan, On the bare ground, you will get good data, but on the trees and grass, you will only get the surface.. Water is obviously a no-no, and anything that moves or reflects."
Jan 8, 2016
Darius Jack replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"@Quan, you can get 1cm GPS accuracy and 1cm resolution with RTK GPS diff and corrections, modern GPS chips can be clocked 1Hz up to 50Hz. To establish an array of Ground Control Points for a large area ortho surveyed you don't need to spend…"
Jan 8, 2016
Quan Le replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Many thanks Cedric just a final point before I move to the direct email, if the ground is a mixture of bare ground, glass of different heights, crops and some trees (typical of Africa arable land) the would the accuracy be OK? We will go through the…"
Jan 8, 2016
Cedric Pieterse replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Thank you kindly sir!"
Jan 8, 2016
Paul Meier replied to Quan Le's discussion Drone topographical survey for agriculture in Africa - What have we done wrong? Business opportunity in the group Agricultural UAVs
"Cedric, thanks for sharing. Excellent paper "
Jan 8, 2016

Profile Information

Please tell us a bit about your UAV interest
growmoreX is GMX Agri's drone based farming application services in Africa
Hometown:
London

Comment Wall (4 comments)

At 6:25am on January 11, 2016,
Moderator
keeyen pang
said…
Dear Quan Le
Thanks for adding me. I read through your very interesting discussion and found quite a lot good info. As there are lot of great UAV company in that area and the fact that I'm base in Malaysia, it is unlikely or economical for me to undertake the job there. But since I'm using very similar equipment and software as yours, I'm happy to provide any info for you.
For your requirement, I agree GCP and higher side lap, 70 % or so will be require. This is because many time the drone will grab an angle relative to the flight line due to cross wind condition and depending on the grab angle, it will reduce the overlapping. All software need sufficient data to generate accurate result.
At 6:35am on January 11, 2016, Quan Le said…
Dear Keeyen
You are right the flying we can work with a number of providers. It is the processing especially for oil palm including looking at signs of stress that we will still need help on. Would you be able to work with us or point us to the right direction in relation to mapping and assessing growth issues of oil palm plantations?

Btw congrats on your 100km achievement. We are interested in purchasing the UAV also.

Best
Quan
At 7:08am on January 11, 2016,
Moderator
keeyen pang
said…
Dear Quan Le
We do work with a few establish oil palm plantation here in Malaysia and Indonesia. Currently the most popular application for the drone data is palm inventory, road / drainage measurement, block area calculation ect.
As for oil palm growth issue such as nutrients deficiency or water stress, generally you can use near infra red camera such as Tetracam or Micasence to capture NIR data and generate NDVI map which may tell you the good and the bad and anything in between. Jeff also have a low cost NIR filter to be fix with any point and shoot camera. But all these may need ground calibration and ground truth data to interpret it.
Both Tetracam lite and Micasence can easily fitted to your current drone. I read somewhere that Micasence give better data.
At 8:24am on January 11, 2016, Quan Le said…

Many thanks for your advice Keeyen - hope we can work together somehow. Could we use some of your oil palm images you put online as demonstration of capability of UAV tech?

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