Trouble with getting good Orthophoto

[Deronm]

I am working on a project for a company that needs orthophotos done on water towers. We are using the inspire one, which has all the metadata included in every picture. Here are my results and the original pics.

https://www.dropbox.com/sh/9n93o0kclf8nz19/AACX0YGuMAZnBw9S2d9AOqKua?dl=0

https://www.dropbox.com/s/mpi9w5lfohzmblx/Orthophoto.tif?dl=0

I need help...

Thanks,
Derron

[tutoss]

Hi Deronm,

1) Your flight plan don't look very well, do it like a grid with a high overlap (80%-60%)
2) The uav-terrain distance obviusly  is not equal to uav-tower, so take extra photos with a higher elevation of the tower
3) take a look on this site, specially on the "Large Vertical Objects reconstruction": https://support.pix4d.com/hc/en-us/articles/202557459
4) sorry for my english :p

[mrb]

Hi Deronm,

1) Your flight plan don't look very well, do it like a grid with a high overlap (80%-60%)
2) The uav-terrain distance obviusly  is not equal to uav-tower, so take extra photos with a higher elevation of the tower
3) take a look on this site, specially on the "Large Vertical Objects reconstruction": https://support.pix4d.com/hc/en-us/articles/202557459
4) sorry for my english :p

What tutoss said. You need more overlap, and, likely, more photos in general.
I'm not sure what you mean about the metadata of the Inspire1... the EXIF data?  Any GPS points likely won't be accurate enough and could potentially hurt rather than help.

I'd add that, if you're trying to make an orthophoto of the facade of the tower (unclear from your post), top down orthographic photos aren't the way to do it.

[Diego]

I need help...

Maybe this helps a little. Orthophoto v2.0 = https://www.sendspace.com/pro/dl/3v2vmy

[SuperNewb]

Diego, What did you do to clean this up so nice?  if you don't mind me asking.

[James]

Diego, What did you do to clean this up so nice?  if you don't mind me asking.

I'll bet it involves elements of Trimble Orthovista and Photoshop. With anything but the best input photos these orthophotos generally need tidying up in external software.

[Diego]

Diego, What did you do to clean this up so nice?  if you don't mind me asking.

Hi SuperNewb,

Aerotriangulation = PhotoScan

DSM = PhotoScan

DTM Filter/Edit = Summit Evolution

Orthophoto = Summit Evolution

Best regards,

Diego

[Pixel UAV]

i ran this through photoscan and got slightly better results when i made the mesh in arbitrary mode instead of height field.  It stopped the tin forming from the edge of the tower to the ground which makes the jagged edges in the smaller tower. 
still need more pictures that capture the side of the tower though
https://www.dropbox.com/s/7rw9w4l1x8bq0eu/test%202.jpg?dl=0