How to select / change the Image / GCP / Output Coordinates System

 
Access: For:
  • Images: On the Menu bar, click Project > Image Properties Editor..., in the section Image Geolocation, on Coordinate System, click Edit...
  • GCPs: On the Menu bar, click Project > GCP/MTP Manager..., in the section GCP Coordinate System, click Edit...
  • Outputs:
    • On the Menu bar, click Project > Select Output Coordinate System...
    • When creating a new project, the Select Output Coordinate System window is displayed after Image Properties.
 
Important:
  • The output coordinate system does not need to be the same as the images' coordinate system or as the GCPs' coordinate system. It is recommended, though, that the output coordinate system is the same as the GCPs' coordinate system.
  • For GCPs: All GCPs must have the same coordinate system.
 
Note: The default Selected Coordinate System is:
  • For the images: WGS84 (egm96).
  • For the GCPs: The coordinate system that is selected when creating a new project under the Output / GCP Coordinate System section: Step 2. Creating a Project.
  • For the Outputs:
    • Arbitrary: If the project has neither image geolocation nor GCPs.
    • The corresponding UTM zone: If the project has image geolocation.
    • The coordinate system that is selected for the GCPs: If the project has GCPs.

In order to select / change the coordinate system of the images,GCPs or for the outputs, follow the instructions below depending the coordinate system desired:

 

For local / arbitrary coordinate system

1. Open the Select Image / GCP / Output Coordinate System window, for:

    • Images: On the Menu bar, click Project > Image Properties Editor..., in the section Image Geolocation, on Coordinate System, click Edit...
    • GCPs: On the Menu bar, click Project > GCP/MTP Manager..., on GCP Coordinate System, click Edit...
    • OutputsOn the Menu bar, click Project > Select Output Coordinate System...

2. In the Select Image / GCP / Output Coordinate System window, on Coordinate System Definition section, click the Unit dropdown list to set the units of the coordinate system (meter [m] or international foot [ft]). 
3. Select Arbitrary Coordinate System [unit].
4. (optional) Only for the Output Coordinate System: If a site calibration exists, select the Advanced Coordinate Options check box. Then:

1. Click Site Calibration... For more information about the Site Calibration: Select Image / GCP / Output Coordinate System .
2. Set the site calibration parameters.

5. Click OK.

The coordinate system now has been chosen.

 

For global, continental or national coordinate system defined from list

1. Open the Select Image / GCP /Output Coordinate System window, for:

    • Images: On the Menu bar, click Project > Image Properties Editor..., on Coordinate System, click Edit...
    • GCPs: On the Menu bar, click Project > GCP/MTP Manager..., on GCP Coordinate System, click Edit...
    • OutputsOn the Menu bar, click Project > Select Output Coordinate System...

2. In the Select Image / GCP /Output Coordinate System window, on Coordinate System Definition section, click the Unit dropdown list to set the units of the coordinate system (meter [m] or international foot [ft]).
3.In the Select Image / GCP /Output Coordinate System window, on the Coordinate System Definition section, select Known Coordinate System [unit].
4. (optional) In the search text box, type the desired coordinate system: The search text box allows to find the coordinate system in auto-complete mode from the Pix4Dmapper's database (a coordinate systems' list and EPSG codes).
5. Select the Advanced Coordinate Options check box.
6. Click From List...

Searching with the text box Choosing from the list

 

7. The Coordinate System pop-up window appears:

 

8. On Datum, click on the drop-down list and select the datum.
9. On Coordinate System, click on the drop-down list and select the coordinate system.
10. Click OK.
11. On the Select Image / GCP /Output Coordinate System window, click OK.

 

The coordinate system now has been chosen.

 

For global, continental or national coordinate system defined from EPSG

1. Open the Select Image / GCP /Output Coordinate System window, for:

    • Images: On the Menu bar, click Project > Image Properties Editor..., in the section Image Geolocation, on Coordinate System, click Edit...
    • GCPs: On the Menu bar, click Project > GCP/MTP Manager..., on GCP Coordinate System, click Edit...
    • OutputsOn the Menu bar, click Project > Select Output Coordinate System...

2. In the Select Image / GCP /Output Coordinate System window, on Coordinate System Definition section, click the Unit dropdown list to set the units of the coordinate system (meter [m] or international foot [ft]).
3.In the Select Image / GCP /Output Coordinate System window, on the Coordinate System Definition section, select Known Coordinate System [unit].
4. (optional) In the search text box, type the desired coordinate system: The search text box allows to find the coordinate system in auto-complete mode from the Pix4Dmapper's database (a coordinate systems' list and EPSG codes).
5. Select the Advanced Coordinate Options check box.
6. Click From EPSG...

 

7. In the Coordinate System pop-up window, under Choose EPSG Number, click on the drop-down list and select the desired EPSG code.

8. Click OK.
9. In the Select Image / GCP /Output Coordinate System window, click OK.

 

The coordinate system now has been chosen.

 

For global, continental or national coordinate system defined from .prj

1. Open the Select Image / GCP /Output Coordinate System window, for:

    • Images: On the Menu bar, click Project > Image Properties Editor..., in the section Image Geolocation, on Coordinate System, click Edit...
    • GCPs: On the Menu bar, click Project > GCP/MTP Manager..., on GCP Coordinate System, click Edit...
    • OutputsOn the Menu bar, click Project > Select Output Coordinate System...

2. On the Select Image / GCP /Output Coordinate System window, on Coordinate System Definition section, click the Unit dropdown list to set the units of the coordinate system (meter [m] or international foot [ft]).
3.On the Select Image / GCP /Output Coordinate System window, on the Coordinate System Definition section, select Known Coordinate System [unit].
4. (optional) In the search text box, type the desired coordinate system: The search text box allows to find the coordinate system in auto-complete mode from the Pix4Dmapper's database (a coordinate systems' list and EPSG codes).
5. Select the Advanced Coordinate Options check box.
6. Click From .prj...

 

7. On the Import .prj File pop-up window, navigate to the .prj file.

 
Note: For information about how to obtain or create a .prj coordinate system syntax file: How to obtain or create a .prj coordinate system syntax file.

8. Select the .prj file.
9. Click Open.
10. On the Select Image / GCP /Output Coordinate System window, click OK.

 

The coordinate system now has been chosen.

 

For auto detected coordinate system (only for the output Coordinate System)

 
Important: If the project does not have image geolocation, this option is not available.

1. Open the Select Output Coordinate System window: On the Menu bar, click Project > Select Output Coordinate System... 
2. In the Select Output Coordinate System window, on Coordinate System Definition section, click the Unit dropdown list to set the units of the coordinate system (meter [m] or international foot [ft]).
3. In the Select Output Coordinate System window, on the Coordinate System Definition section, select Auto Detected.  Based on the coordinates of the images and the selected unit, Pix4Dmapper will auto detect a coordinate system.
4. On the Select Output Coordinate System window, click OK.

 

The coordinate system now has been chosen.



 

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7 comments

  • Alireza Gharaeian

    Thankyou very good

  • DJI Phantom

    Hi. I am a new user from Romania, I am trying the trial version of PIX4D. The images are stored with  WGS84 coordinates. When I set the output data to Stereo70 (used in Romania), I have a difference of about 2 m in x / y. Is the translator integrated in the program to blame? 

  • Christina (Pix4D)

    Does your project have GCPs? It is expected to have such an error if the project does not have GCPs given that the images' coordinates are not very accurate (unless you use a RTK drone). For more information: GCPs

     

  • Ognjen Kralj

    Hi,
    my images are UTM zone 33N, and my GCPs are MGI Balkans zone 6 (Gauss Krugger coordinate system). I want outputs to be as same coordinate system as my GCPs are. How to do that?
    Example: output coordinate now - 65293.34, 4989763.21, 304.21
    desired coordinate - 6393753.43, 4989321.35, 304.21

  • Christina (Pix4D)

    On the Menu bar, click Project > Select Output Coordinate System...

    and define the coordinate system of your outputs. I hope it helps!

     
    Edited by Christina (Pix4D)
  • Ognjen Kralj

    Thanks for your answer.

    Well, i did what you said, but there is no desired coordinate system in the list when defining my outputs, and my final point cloud is not in coordinate system as my GCPs. At the begining of the process, I converted my MGI Balkans/ Zone 6 GCPs coordinates to WGS 84, because i was getting a warning that images and gcps coordinates are too far away, and the final point cloud is not what I want. 

     

  • Christina (Pix4D)

    Hello Ognjen Kralj,

    Both your GCPs and your output coordinate system should be set on the system you are interested in. Below you can see an example of what this could look like but you should confirm what the right coordinate system is for your case:

     

    There is no need to convert your GCPs' coordinates to WGS84.

    If you own a Pix4Dmapper valid license with valid Support, you can contact us here so that we can further assist you.

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