How to use GCPs for processing on the Cloud platform

Ground control points (GCPs) can be used for processing on the Cloud. However, they should be marked using Pix4D Desktop beforehand.

 
Important: It is not required to process on a computer. Opening the project and adding GCPs is sufficient.


1. Open the project using Pix4D Desktop:

2. On the menu bar, click Project > GCP / MTP Manager...
3. Select the GCP coordinate system.
4. Import the GCPs coordinates. For more information: How to import and mark ground control points (GCPs)
5. In the window GCP/MTP Manager, click Basic Editor...
6. In the section GCP/MTP Table, select the GCP to be marked.



7. In the section Images, sort the list:

sort_by_alphabet.png By name: The images are sorted alphabetically.
sort_by_gcp.png By distance to GCP: Images closer to the GCP are listed first. This sorting can be used only if the images and GCPs are geolocated using a known coordinate system. This is the default sorting mode.
sort_by_image.png By distance to the marked image: When an image is selected and a GCP is marked on it, this option lists the images that are closer to the currently selected image. This sorting can be used only if the images are geolocated.

8. In the section Images, select the image on which the GCP should be marked. After the selection, the image is displayed in the Preview section.
9. Navigate in the image by:

  • Zoom in: Moving the mouse scroll wheel forwards.
  • Zoom out: Moving the mouse scroll wheel backwards.
  • Pan: Using the mouse left click.
  • Zoom in quickly on a specific point in the image: Point with the mouse the point and hit the Alt key. When the key is released, the view returns to the last zoom level.
  • Zoom out to preview the zero zoom level: Hit the Shift key. When the key is released, the view returns to the last zoom level.

10. Left-click on the image to mark the point. If needed, remove a mark by clicking trashbin.png.



11. In the Images section, select the next image on which the GCP should be marked.

 
Note: A GCP does not need to be marked on all images in which it appears. Ideally, mark a GCP on 3 to 8 images (minimum is 2).

12. Repeat steps 8. to 11. for other GCPs.
13. Click OK.
14. On the menu bar, click Project > Save Project.
15. Upload the project from Pix4D Desktop to Pix4D Cloud. For more information: How to upload project files from desktop to cloud.

 

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12 comments

  • Zach Mellott

    I get this message when trying to upload to the cloud after these steps "Error e0502b: Project XXX failed to upload

  • Alice (Pix4D)

    Hi Zach,

    you are uploading from Pix4D Desktop, where you are logged in with a Discovery license, that's why you cannot upload to the Cloud. Please, log out and log in with the Mapper license. Let me know if you still have issues

  • Susan Myers

    Upon seeing the solution after processing a project on the cloud, if one wants to modify the GCPs or output selections used for a project that has been uploaded and processed in the cloud, is it possible to do so without creating a new cloud project? 

    Is it possible to process one step of a project at a time on the cloud?  Such as processing step 1, or steps 1 and 2, then download the project, edit the point cloud, then upload back to the cloud to process step 3?  If not, is this possibility being considered for the future?  

    Thank you.

  • Holden (Pix4D)

    Hi Susan. This currently isn't possible. The cloud, as it is now, is best suited for tasks where the processing options and GCPs are integrated locally then uploaded for processing. The cloud team is working to improve cloud functionality and you can provide your suggestion at the link below. 

    https://support.pix4d.com/hc/en-us/community/topics/115000042043-Product-feedback?sort_by=recent_activity

  • Edgar Teyssier

    Hola buenas tardes , tengo un problema grave traigo un error de 5.30 en z vuelo con ebbe pluss con rtk y una geobase y PPK , procese el paso 1 y 2  checo el punto deseado para compararlo con mi gps  de presicion 

    Por otra parte yo tome lecturas con un GPS  de presicion  y al comparar el punto con en Z es muy grande el error que estara pasando no da la presicion quien me puede ayudar

  • Jose Ripio

    Pix4D Cloud should allow users to import GCPs UTM coordinates and use them to improve accuracy

  • Daniel (Pix4D)

    @Edgar, por favor abra un nuevo post con su pregunta en la Community en español ya que este artículo se refiere a como utilizar puntos de control en la nube. Muchas gracias!

    @Jose Ripio, for now, in order to use GCPs in the cloud and improve the accuracy, it is necesary to create the project in desktop and upload it. They can be defined in any projected coordinate system, including UTM. Please have a look at this article.

    Regards.

  • jan opdecam

  • jan opdecam

    Hello,

    I can not uploade my project to the cloud.

    regards

  • Alice (Pix4D)

    Hi Jan,

    Can you open a ticket and give us more details?

    How many images does your project have? Can you tell us which is the error you are receiving in the Log Output or can you send a screenshot of the error? Can you also send us the p4d file of the project? Thank you

  • jan opdecam

    Hi Alice,

    I am interested to upload my project to the cloud with the GCP points, especially you can only make quick profiles when processed in the cloud (with GCP points).

    I've marked the gcp points on my Laptop but uploaded to the cloud was unable.

  • Marco (Pix4D)

    Hi Jan,

    If you want to use GCPs in the Cloud, it is recommended to process locally (or on the Cloud and then download the project) the step 1 and then mark the GCPs save and then upload your project in the Cloud to process step 2 and 3.

    However it seems that you have issue uploading your projects in the Cloud and at this stage it is difficult to understand what is going on.
    As suggested above, could you please send us a ticket here so we can investigate?
    https://support.pix4d.com/hc/en-us/requests/new
    Thank you

    Best

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