Each dataset, and corresponding outputs and annotations, is given in a specific coordinate system according to different factors:
- The input files.
- The output coordinate system defined during the project creation.
- The use of GCPs or of the AutoGCPs detection functionality.
- Whether the images are processed on the Cloud servers or not.
- How the project is created (uploads from other software).
Dataset and output coordinate system
If the dataset is created importing images directly with PIX4Dcloud
More information on how to create a dataset with images inNew dataset.
| Do images have geolocation? | Is the AutoGCPs detection functionality used? | Which is the dataset/output coordinate system? |
| Yes, in WGS84 (*) | Yes, GCPs have a supported projected coordinate system. | The horizontal and vertical output coordinate system selected for the GPCs. |
| No AutoGCPs detection functionality is used. |
The selected horizontal and vertical output coordinate system. By default, the output system will be WGS84 / UTM XX. The UTM zone is computed based on the image EXIF information.
|
|
| No | PIX4Dcloud does not support images with no geolocation. |
PIX4Dcloud does not support images with no geolocation. |
(*) PIX4Dcloud is expecting to get images with geolocation in WGS84
If the dataset is created importing results directly with PIX4Dcloud
More information on how to upload results can be found in How to upload results and outputs to PIX4Dcloud.
- If at least one georeferenced output is uploaded (orthomosaic GeoTIFF, DSM GeoTIFF, point cloud), the dataset is georeferenced using the coordinate system of the first output that has been uploaded.
- If multiple results are uploaded, all the georeferenced files should have the same coordinate system.
- To replace a result, the re-uploaded file should have the same coordinate system as the dataset, otherwise it will not be aligned with the existing outputs.
| Is the output georeferenced? | |
| Point cloud (.las) | The coordinate system is usually embedded in the .las file but not always. |
| Orthomosaic/DSM uploaded is a GeoTIFF | The coordinate system is usually embedded in the .tif file but not always. |
| 3DMesh files (.OBJ) | The OBJ format does not have a cooridbate system. |
| IFC file (.IFC) | The coordinate system is usually embedded in the .ifc file but not always. PIX4Dcloud does not read the coordinate system of the file |
In order to set a coordinate system when importing a 3Dmesh or an IFC file, the following procedure has to be followed.
If the project files are uploaded from PIX4Dmapper
| Do images have geolocation? | Are GCPs used? | Which is the dataset/output coordinate system? |
| Yes/No | Yes/No | The output coordinate system is the one defined as the Output coordinate system in PIX4Dmapper before uploading it to PIX4Dcloud. |
More information on how to upload project files in How to upload project files from PIX4Dmapper to PIX4Dcloud.
If the project files are uploaded from PIX4Dcatch
| Was the RTK device used? | Which is the dataset/output coordinate system? |
| Yes | The output coordinate system is the one defined in RTK Device Settings dialog. |
| No |
By default, the output system will be WGS84 / UTM XX if the images are in WGS84. The UTM zone is computed based on the image EXIF information. |
Annotations coordinate system
Displayed coordinates in the 2D/3D view
- Horizontal: Displayed as latitude and longitude in WGS84 (decimal degrees) and also as X, Y coordinates in the dataset coordinate system.
- Vertical: The same vertical coordinate system as the dataset vertical coordinate system. The unit can be meters (m) or international feet (ft) according to the account preferences. For more information: PIX4Dcloud - FAQ.
Coordinates of the exported annotation layers
- Horizontal: The annotation layers are exported in WGS84 or project coordinate system depending on the export format.
- Vertical: The same as the dataset vertical coordinate system.
Coordinates of the imported annotation layers
- Horizontal: The annotation layers have to be imported in WGS84.
- Vertical: They have to be imported in the vertical coordinate system of the dataset.