Positioning/georeferencing
Choose how the aerotriangulation should adjust and orient the block.
Positioning modes are enabled according to input block properties.
Aerotriangulation can work with positioning constraints but in this case, block position and orientation are arbitrary.
Adjustment constraints:
- Control points (need a valid control point set): The block is accurately adjusted to control points (advised when control points accuracy is consistent with the resolution of input photos).
- Photo positioning metadata (available only if the input block has at least 3 photos with positioning metadata): the block is accurately adjusted according to the photo positions from the pose metadata (advised with accurate metadata).
- Point clouds (scans).
Final rigid registration:
- Positioning constraints on user tie points (available only if the input block has positioning constraints): the block is rigidly place/oriented/scaled thanks to the predefined constraints.
- Photo positioning metadata for rigid registration (available only if the input block has at least 3 photos with positioning metadata): the block is rigidly registered to photo positions from pose metadata (advised with inaccurate metadata).
- Control points (need a valid control point set): The block is rigidly registered to control points without handling long range geometric distortion (advised for inaccurate control points).
- Point clouds (scans).
Use targets (QR Codes, AprilTags or ChiliTags)
Allows to register block with positioning constraints or control points from targets extracted from photos. Current survey data is also used.
For positioning modes using control points, a valid control point set is needed on selected photos: at least 3 control points with more than 2 measurements each.
Learn more about targets creation ContextCapture Target creator [page 189].