Forum

Author Topic: Ground control based pre-selection for chunk alignment  (Read 2493 times)

dcm39

  • Newbie
  • *
  • Posts: 34
    • View Profile
Ground control based pre-selection for chunk alignment
« on: September 08, 2014, 02:24:56 PM »
Hi, not sure if this exists some how already, but I don't think it does.

When running chunk alignment, I have ground control for each chunk separately, but it seems that the "preselection" option for the point based alignment is just the simple "generic preselection".

For a nice linear survey with three chunks, the software really shouldn't need to try and match all of the photos, only the nearby ones. Can we have a "ground control" preselection for chunk alignment?

Alexey Pasumansky

  • Agisoft Technical Support
  • Hero Member
  • *****
  • Posts: 13297
    • View Profile
Re: Ground control based pre-selection for chunk alignment
« Reply #1 on: September 08, 2014, 03:10:04 PM »
Hello dcm39,

If you have all the chunks already referenced in the same coordinate system, they are actually already aligned.
Best regards,
Alexey Pasumansky,
Agisoft LLC

dcm39

  • Newbie
  • *
  • Posts: 34
    • View Profile
Re: Ground control based pre-selection for chunk alignment
« Reply #2 on: September 08, 2014, 04:08:05 PM »
Indeed they are, but the precision to which they are aligned is not the same as that achieved by feature matching unless the ground control is very accurate.