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Not happy with my map

Hi, MME. I am not happy with the map I have made recently. I got nadir and oblique images with the Mavic 2 Pro, DroneDeploy and DJI Ground Station Pro. This is my settings:

1. The high of the house: 10 m

DroneDeploy settings

Flight speed was 2m/s

 

Ground Station Pro settings:

With Ground Station Pro I made 5 orbit layers from 29.9 to 15.5 meters high. Camera angle -45.8. Overlapping 75-65

Overlap Report is nice.

There is my poor result: https://www.mapsmadeeasy.com/maps/detail/2bd4118da5db49a88cc7bf2d5d877513/

Please show me where I was wrong, or maybe you would be so kind as to return me some points!

Nikolay Pirozhkov

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We are sorry to hear you are not happy with your results. 

As noted in the Data Collection guidelines that are agreed to at the time of upload, sideways flight (orbit) is not recommended. 

https://www.mapsmadeeasy.com/data_collection

"Never Fly Backwards or Sideways - Collect all of your data while traveling forward. Most aerial cameras have rolling shutters and mixing forward and backward flight ruins the chances of the job turning out well."

For 3D data collection we recommend flying a grid mission with the gimbal tipped up 20 degrees or so. Sideways orbit flight is awful when using a rolling shutter camera like yours (especially when you mix directions like you did). 

Also, if the house is 10m high we recommend flying much higher than you did. That is the reason the top of the house didn't turn out well. This too is covered in the Data Collection guidelines:

"Don't Fly Lower than 4-5 Times the Height of the Tallest Object in the Survey Area

The taller the object, the less overlap it will get.

Our processing is based on getting multiple looks at things. Multiple looks at things are attained through overlap. A tall object will be viewed less often than an object on the ground and will likely have problems rendering. If the tallest object in your survey area is 10 meters, fly at least 40 meters above ground. Flying with minimal clearances is not only dangerous, it will produce imagery with blocked areas and generate poor results."

 

Yes, the overlap is sufficient but if you take the data doing all this other stuff it isn't likely going to work out well. 

Zane
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So, if I would like to create a perfect 3D model with MME, I should fly the grid mission with nadir, then the grid mission with the gimbal tripped up 20 degrees and processing the data with Full 3D?

All of these models were created with mixing forward and sideways flight. 

https://skfb.ly/6LOtu

https://skfb.ly/6KQvs

Nikolay Pirozhkov 0 votes
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Could I manually trip up gimbal to 20 degrees using Map Pilot App?

Nikolay Pirozhkov 0 votes
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Fly a grid mission with the gimbal tipped up. That's it. Usually with any structure you will have to do some manual flying to fill in overhanging areas. 

Map Pilot does this. 

Zane 0 votes
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Thank you for your answers!


And what your recommendation to do a manual flying? How to do manual facade images without sideways flying?  Whan about the high of flight and camera angle when capturing facade images?

Nikolay Pirozhkov 0 votes
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Just fly like normal and stop to take pictures. 

Even with the camera facing nadir it will get a lot of the sides of vertical features because the camera has a pretty wide field of view. Tipping it up 20 degrees or so will give the sides plenty of exposure. It is the overhanging areas you need to be concerned with filling in manually. 

Zane 0 votes
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