Geo-referenced Tetra Cam ADC Multi-spectral Imagery (Drone Agriculture/Farming)

Subset of Tetra Cam ADC Imagery

We recently received a data collection courtesy of David Dvorak using the Tetra Cam ADC Multi-spectral image sensor. DroneMapper processed 189 geo-tagged 3.2 mega pixel images into geo-referenced Orthomosaic, DEM, DSM and Point Clouds with an area of 1.6 km sq. The AGL of the flight was 1000 ft resulting in a 15 cm GSD per pixel. Processing time was about 2 hours for this data set. 


Geo-referenced Orthomosaic using Tetra Cam ADC

Accurate DEM construction is still possible using 3.2 mega pixel images:

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Comment by Kirill Setdekov on March 20, 2013 at 6:06am

Cool) Could you please share this sample data with me? I am learning agisoft photoscan and still have trial time left. I would send you orthomosaic and model back so you could compare it with dronemapper. PM me, please!

Comment by Tim Woodward on March 20, 2013 at 6:08am

Very nice. Are you going to do any crop index maps from this (NDVI, SA-NDVI, GI, etc)?

Comment by JP on March 20, 2013 at 6:16am

Hi all: 
@Kirill Thanks for the offer! We would have to check with the owner of the data if that is possible. I think Pteryx and pix4d both have raw nir imagery available for testing if you are interested. 

@Tim We haven't from this data set yet but may when time permits. We've done a few NDVI / EVI calculations on other data sets (see my blog on this site)


Comment by Liam Honecker on March 21, 2013 at 6:39am

That's a beautiful image.  Next you need to put the spectral index for marijuana into the wild and you'll create a drone market for liberals and conservatives. Instead of mapquest, you'll have potquest.  Tomtom's will be declaring drug users have "reached [their] destination" for ditch weed across the world.  Law enforcement will want the latest cop-pot-copters. Oh, I suppose it's probably pretty useful for fallow fields and AG stuff too... j/k.  Very impressive work, especially the digital elevation models.  Did you use stereo vision or construct it from multiple passes? 

Comment by koen.hufkens on March 21, 2013 at 2:38pm

Really sweet, I would love to see some vegetation indices and maybe some classification results?

Comment by Neil Yu on May 15, 2013 at 9:10am

Very nice work!

Would you please recommend the gimbal options for mounting ADC camera? I plan to purchase the Turbo Ace X88.

Thank you!

Comment by JP on May 15, 2013 at 2:36pm

Thanks, unfortunately I don't have a good gimbal recommendation. I have seen some recent posts on this site for good looking gimbal designs .. we can work with off NADIR imagery but only to about 20 degrees or so

Comment by Ricardo Affonso on May 24, 2013 at 1:02pm

i´m trying to get a mosaic with a set of images from tetracam on the 30-day trial version of agisoft photoscan, still with no sucess. does anyone have any hint on how to get the software to understand the r-g-nir bands? even with gps info, the poit cloud is totally wrong, and the generated mosaic is useless.

Comment by Arnaldo Santos on December 4, 2013 at 4:04am

the resolution of the tetracam is super low... compared to a modified poweshot camera.. I was seeing one canon s100 modified by maxmax, looks the same as tetracam, but with 4000x3000 pixels


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