Annotations that can be created and exported from Pix4D Cloud are distances, areas (including their perimeters), volumes and markers. Measurements rely on geolocation. The measurement unit, imperial or metric, is the one selected in the account settings. For more information: Cloud general questions.
Annotations in 2D and 3D are synchronized: once they are created/edited in one view, they are automatically transferred/modified in the other.
Measurements and markers have the following characteristics depending on the output coordinate system, known or arbitrary, and whether the images are processed on the cloud servers or not.
- Horizontal: Annotations have latitude and longitude in WGS84 in decimal degrees. Projects created under a Pix4dmapper license also have X, Y coordinates in the projected coordinate system of the project.
Vertical: In meters or feet according to the account preferences.
- Images uploaded via Pix4D Cloud: Annotations have the same vertical system as the images, which also applies to all resulting outputs.
- Project uploaded from Pix4D Desktop: Annotations have the same vertical system as the outputs according to the selected options. For more information: How to select / change the Image / GCP / Output Coordinate System.
|Cases||2D view||3D view|
Project is processed AND output coordinate system is known
Default horizontal coordinates.
Default horizontal and vertical coordinates.
Only results are uploaded
Output coordinate system is arbitrary
1. The .tif file contains geolocation data (GeoTIFF format): Default horizontal coordinates apply.
2. The .tif is not georeferenced: Coordinates are computed with respect to an arbitrary project origin (0, 0).
1. Point cloud (.las) is available: Coordinates are extracted from the uploaded .las file directly so the X, Y, Z values are in the output coordinate system.
2. Only mesh (.obj) is available: Coordinates are computed with respect to an arbitrary project origin (0, 0, 0).
Distances, areas, volumes and markers can be exported in three different formats:
- GeoJSON (georeferenced annotations): Available both in the 2D and 3D views.
- Shapefile (georeferenced annotations): Available both in the 2D and 3D views only under a Pix4Dmapper license, otherwise available only in the 2D view.
- CSV (properties of the annotations only): Available both in the 2D and 3D views.
Annotations cannot be saved individually, they are all exported at once:
1. Ensure each annotation has the desired name and optionally, a description.
2. On the left sidebar, click Annotations. This highlights all annotations in the current view.
3. On the right sidebar, select the export format. Clicking automatically starts the download.
For projects created under a Pix4Dmapper license, annotations can also be imported in GeoJSON format, once they are exported from the Cloud.
To import the annotations:
1. On the left sidebar, click Annotations.
2. On the right sidebar, click IMPORT FILE (GEOJSON).
3. Browse for the desired GeoJSON file.