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Reflective Water in Orthomosaic

Hi there,

What is the best way to deal with reflective water surfaces? In my map there was a small lake. (I am second guessing the outcome here)

Thanks!

Hello,

It is indeed difficult to calibrate the images that capture only water since it is very hard to find keypoints on water surfaces and even if keypoints_ are found, it is very hard to match them between images. _

I suggest taking images that contain water with some land (30% of land minimum) so that the images will get calibrated and contribute to the orthomosaic generation.

Check this article for more info: 202557459.  

Best regards, 

Hello,

I´m working on a survey of an open pit mine, that has a lake inside. As you know, that water is an issue for photogrammetry, so I tried the surface option. However, the borders of the lake is full of bush, and I can´t have a constant elevation on the MTP. If I put too much on the water, is not reliable due the erratic points created. If I put on land, I touch the top of the bush cannopy, so is also erratic and not constant the elevation. I can´t edit the Z value of each MTP, I can´t import any shp file… in fact this is a tool too limited to solve the challenge of the water in photogrammetry, what is even worse, as if we know in advance that this one the biggest downside of the photogrammetry against other methods, like LIDAR, I was expecting a better solution to answer to this need.

Please, how can I sort this out, creating the surface of the water with a constant elevation?

…and I know that this not possible at the moment, but will be great if in a future release, we can define a surface that can be mandatory to the point cloud, and will push the points to adjust to that specific elevation, and doing so, we can use and export the full point cloud, instead playing around with the erratic points and putting them into the disable group.

Thank you,

Regards
Nuno Santos

Hey Nuno,

Very interesting use case. Thank you for sharing it with us. 

At the moment, I don’t think it is possible to import surfaces in the software. As you said, you would have to create them directly in the software and edit each MTP separately. 

I will pass it on to our product development team for review for future releases.