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Photogrammetry for Agriculture & Forestry

Delair.ai gives the possibility to its users to process their images by launching the photogrammetry in different ways depending on the camera sensor (3Band, 4Band, 5Band, etc.), availability of the reflectance target, availability of ground control points.
Delair.ai also gives the possibility to its users to select who will process the data by utilizing the option “Advanced” or “Self-Service”

  • Self-Service (Recommended)
    • Selection of engine to be used resulting in quicker processing time and more control on the process
    • Users will have the responsibility for identifying and clicking their own GCPs if applicable. 
    • There will be no Delair check
    • Delair recommend using this option as the customer have more control of the analytics
  • Advanced 
    • Takes more time than the self service
    • The result is checked by Delair.
    • Should be used in specific situations following Delair recommendations

You have placed GCPs?

If you have placed and surveyed GCPs before the flight, select “ Add ground control points” and drag and drop your GCP file.

The file should be in .CSV or .TXT format, no header row and only delimited with a comma. The file must be in the following format:

1. name/reference of the GCP
2. X coordinate
3. Y coordinate
4. Z value
5. X accuracy (optional)
6. Y accuracy (optional)

Once the GCP file has been uploaded, verify that the x/y/z columns appear in the correct order.
Click Edit to select the GCPs coordinate reference system. The GCP CRS will only give you the option of the project CRS defined. That CRS must be selected.

If the selected CRS and the GCP file coordinate system match, the GCPs should appear on the map as orange dots within the survey boundary.
If nothing appears, then it may be possible that the CRS is incorrect or the X and Y coordinates are reversed.
To retry, deselect Add ground control points (GCP), fix the file, and then select Add ground control points (GCP) and try again.
Once the GCPs appear on the map as figuring on the image on the left, click Launch Mapping and the Photogrammetry process will initiate.

Calibration panel :

Proceed with the shown steps to calibrate the reflectance target.

The albedo value is provided with the target, and needs to be filled respectively for each band



Main compatible sensors in delair.ai for Agriculture and settings :

 

Brand

Model

Upload requirement

Photogrammetry

Micasense

Rededge-MX, Rededge-Mini, Rededge 3

5 bands + calibration target

Self service mode with recommended settings (see here)

Micasense

Dual

10 bands + calibration target

Self service mode with recommended settings (see here)

Micasense

Altum

5 bands + thermal images (optional) + calibration target

Self service mode with recommended settings (see here): thermal band will not be processed

Advanced mode with recommended settings (see here): thermal band will be processed

Parrot

Sequoia, Sequoia +

4 bands + calibration target

Self service mode with recommended settings (see here)

RGB sensor in different survey

Self service mode with custom settings (see here)

DJI

Phantom 4 P MSP

5 bands

Self service mode with recommended settings (see here)

RGB sensor in different survey

Self service mode with custom settings (see here)

Sentera

Double 4K 

RE NIR + RGB (in the same survey)

Self service mode with recommended settings (see here)

RGB sensors

 

RGB sensor

Self service mode with custom settings (see here)









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