How to use the 2D Comparison tool on Pix4Dbim Cloud

How to compare two datasets

1. On Pix4Dbim Cloud, open a Site.

Important: The Compare mode is only accessible from a Site, not from an uncategorized dataset. Only two projects belonging to the same Site can be compared.

2. Select a dataset in the timeline.
3. On the upper bar, next to the project timeline, click the COMPARE button. The Compare mode will be activated.
4. The dataset selected at point 2 appears as the dataset icon_2.png by default. Choose the dataset icon_1.png by clicking the calendar icon and select the date of interest. Only days for which a dataset is present can be selected. If more datasets are available for one day, the capture time can be specified.

date_picker.jpg

Note: In Compare mode, the generated 2D outputs (orthomosaic and DSM) and the imported CAD Overlay files can be compared.

5. When the two datasets of the comparison are selected, both appear on the screen, split with a slider. Move the slider from right to left or up and down, depending on the view mode, to compare results of one day with results of another. Zoom in/out and span the image to see your map in more detail.

comparison.JPG

6. (Optional) Change the dataset icon_1.png or dataset icon_2.png by selecting a different date via the date picker (calendar icon).
7. To exit the Compare mode and return to the main page, on the upper bar click EXIT COMPARE MODE.

Note: Two view modes are available: vertical vertical_mode.png (default) or horizontal horizontal_mode.png. Switching views is possible at any time, clicking the correspondent mode icons.
 
Tip: The accuracy of the 2D Comparison depends on the absolute accuracy of the outputs. Using GCPs or RTK drones improves the absolute accuracy of the results.

How to share the 2D comparison

Share the comparison with the project's stakeholders by clicking SHARE at the top right of the window, while in Compare mode. Copy-paste the link to directly share the compared datasets. Collaborators can change the dataset icon_1.png or dataset icon_2.png to other datasets available in the same Site for further comparisons.

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