How to use the Overlay tool on Pix4Dbim Cloud

  • The Overlay feature is only available on Pix4Dbim Cloud.
  • The Overlay feature supports PDF (georeferenced or not), JPEG, JPG and PNG files.
  • Multiple files can be uploaded and overlaid in a single project.

The Overlay tool allows to easily import and overlay design plans and maps on 2D orthomosaics in Pix4Dbim Cloud. With the Overlay tool you can quickly compare the as-built with the as-designed to easily check progress and identify as-built errors.

To use the Overlay tool

1. In the 2D view, in the Overlays section of the left panel, click ADD OVERLAY.
2. An upload wizard opens. To upload a file either select UPLOAD FILE and browse to the file or drag and drop the file into the upload box.

Note: Ensure the file format is PDF (georeferenced or not), JPEG, JPG or PNG and in high resolution for smooth display and zooming.
Note: If required, the uploaded file can be replaced by selecting REPLACE FILE.

3. After uploading, a preview of the file is displayed. Click NEXT to continue.
4. Define two points of reference on your plan placing the blue and red markers on the image.
To place markers more precisely or check the markers' placement:

  • Zoom in by scrolling the mouse scroll wheel forwards.
  • Zoom out by scrolling the mouse scroll wheel backward.
  • Pan by clicking the mouse left button.

5. Once the two markers are identified, select NEXT to align the uploaded file on the 2D map.
6. Align the imported Overlay by dragging the two markers to the same points of reference on the 2D orthomosaic. Match red to red and blue to blue.
It is also possible to manually edit the coordinates of the markers using the Site system coordinates of each marker.

  • Markers coordinates are based on the project coordinates.
  • If a georeferenced PDF is uploaded, the coordinates are automatically placed in, using the coordinates of the PDF.
  • Hit RESET to go back to the coordinates of the markers loaded by default.

7. Once each marker is in the correct position, select COMPLETE to finalize the Overlay process and to return to the project page.


8. The imported Overlay appears in the Overlays section on the left panel. It may take a few minutes to process.

  • To enable large image upload without altering the user navigation, Pix4Dbim Cloud generates tiles from the uploaded file. This may imply that processing can take a few minutes, depending on the size of the file.
  • A processing icon will be displayed during the tiling process.

(Optional) 9. Existing Overlays can be re-positioned or replaced by clicking the pen icon next to them in the left panel.

Important: Once the Overlay is added to a dataset within a Site, it will be present in all datasets within the Site. If the position of an Overlay is edited, it will be edited on all datasets within the Site. If an Overlay is deleted, it will be deleted on all datasets within the Site.

(Optional) 10. The Overlay name can be changed, descriptions and tags can be added to the layer and its opacity adjusted. These changes won't be reflected on the other datasets of the Site.
(Optional) 11. Multiple Overlays can be added to the same Site. To do so, select ADD OVERLAY and repeat from step 1.

Note: If multiple files are uploaded, they can be reordered by using drag and drop.
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