A coordinate reference system provides information and parameters that ensure coordinates are correctly displayed on a map. Depending on your configuration, you will need to select the appropriate input and output coordinate reference systems and the geoid when applicable.

Refer to Coordinate reference systems and 2D projections for more information.

NTRIP coordinate reference system

When using an RTK-enabled device, the NTRIP coordinate reference system is the system used by the NTRIP service to broadcast corrections in.

Select the NTRIP coordinate reference system using the viDoc RTK rover

• Tap the signal indicatorthen select ViDoc RTK via Bluetooth.

  

  Select ViDoc RTK via Bluetooth.

• In the RTK Device Settings dialog:

  

  RTK Device Settings dialog window.

• Select the viDoc RTK rover under Available Bluetooth Devices.
• Enter the NTRIP details, then tap Connect:
  • Hostname / IP
  • Port Number
  • Username
  • Password
• When the connection is established, under Choose mountpoint, select the preferred mountpoint.
• Tap to select the NTRIP coordinate reference system.

• Tap Save.

Output coordinate reference system

The output coordinate reference system is used to reference the reconstruction after processing. It does not need to be the same as the input coordinate reference system or the GCPs coordinate reference system.

Select the output coordinate reference system when uploading to PIX4Dcloud / PIX4Dcloud Advanced (RTK enabled device)

1. Tap Upload

Captured project ready for upload.

2. Tap Output coordinate system.

The Upload Project dialog. Auto Detected is the default setting.

3. Tap Manual to select the horizontal and vertical coordinate reference system.

The Manual selection dialog. Choose the output coordinate reference system when uploading the project.

To manually select the output coordinate reference system:

• Tap to select the horizontal coordinate reference system:
  • In the Horizontal coordinate reference system dialog, search or copy-paste:
    • The name
      or
    • The EPSG code of the coordinate system.
• Tap to select the vertical coordinate reference system:
  • In the Vertical coordinate reference system dialog, search or copy-paste:
    • The name
      or
    • The EPSG code of the coordinate system.
• (Optional) Tap to select a geoid: If the selected vertical coordinate system supports geoids and the geoid model is available in the PIX4D database, select the geoid model in the drop-down list.
• Tap Done.
   

  Important: Ensure the correct vertical coordinate system and/or geoid is selected.

• Tap Upload.

Refer to How to use vertical coordinate systems and geoids - PIX4Dmatic for more detailed information, plus a current list of available geoids is available in the FAQ.

GCPs coordinate reference system information

When collecting GCPs it is possible to select the coordinate reference system to export the GCPs in.

New GCP collection dialog.

Refer to How to import GCPs to PIX4Dmatic, or How to add / import GCPs in the GCP/MTP Manager (PIX4Dmapper) for more information.