Messages

46

General / Re: Issue getting correct orhtomap

« on: January 30, 2015, 03:11:51 AM »

Example:
Use of CGP vs camera position only for georeferencing:

CGP only:



cameras positions only:


diference (transparent is camera positions only):


(use the horizontal bar)

47

General / Re: Issue getting correct orhtomap

« on: January 30, 2015, 02:23:45 AM »

these lon/lan coordinates from any uav are not accurate (error in meters). A proper CGP are accurate in milimeters.

Anyway, if you fly again, fly higher and take more frecuent photos, so you get a higher overlap of the tower, and then you can combine both flights and align them on PhotoScan.

48

General / Re: Issue getting correct orhtomap

« on: January 30, 2015, 01:03:39 AM »

damm... that don't look good.
What overlap do you use (longitudinal/lateral)?

In any case, beside the bad dense cloud, someone here in other post suggest (for data with a high/tall structures) classify Ground Points and then build the mesh only with the Ground Points (the mesh with that dense cloud will be bad anyway).


Aah, and for a serious work (topography, cartography, etc), you need some CGP, the final product without them will be bad, with errors on X, Y, Z, rotation and scale.

(sorry for my english)

49

General / Re: Issue getting correct orhtomap

« on: January 30, 2015, 12:47:20 AM »

how looks the dense cloud of the tower?
Try set a custom value of faces of the mesh, like 100.000.000 and then create the orthophoto.