# How to create the orthomosaic of a facade

Video: Watch the instructional video related to the Orthoplane:

Important:
• An orthoplane can be drawn after step 1. Initial Processing has been completed.
• An orthomosaic of a facade (or orthofacade) can only be generated after step 2. Point Cloud and Mesh has been completed.

In order to draw a new orthoplane in the rayCloud:

1. On the menu bar, click View > rayCloud.
2. On the menu bar, click rayCloud > New Orthoplane.

3. In the 3D View, an orthoplane box appears beside the mouse. Left-click to place the box on a 3D point.
4. Adjust the orthoplane box so that it is parallel to the object (the facade of a building, the slope of a hill, etc.):

Warning: The green arrow should point towards the object to be orthorectified.
• Drag the arrows of the orthoplane box to move it and place it at the desired location. Drag the:
• Red arrow to move it towards the X direction.
• Green arrow to move it towards the Y direction.
• Blue arrow to move it towards the Z direction.

Or use the Position (X,Y,Z) options of the right sidebar: Menu View > rayCloud > Right sidebar > Objects.

• Drag the spheres of the orthoplane box to resize it. Drag the:
• Red sphere to resize the X length.
• Green sphere to resize the Y length.
• Blue sphere to resize the Z length.

Or use the Width, Height, Clipping Distance options of the right sidebar: Menu View > rayCloud > Right sidebar > Objects.

• Use the Orientation (Yaw, Pitch, Roll) options of the right sidebar to rotate the orthoplane box:

Note: All the points included in the orthoplane box are used for the orthomosaic generation.

5. (optional) Click Flip to change the orientation and direction of the orthoplane.
6. (optional) If at least one surface object is drawn (How to draw a Surface in the rayCloud), click Align to align the orthoplane with an existing surface. (Select the desired surface from the drop-down list).
7. Click Apply to save the changes made under the Properties section of the right sidebar.

In order to generate the orthomosaic of a facade:

1. Draw a New Orthoplane. For step by step instructions: How to draw a new orthoplane.

2. Set the Resolution [cm/pixel] of the orthomosaic. For more information about the orthoplane options: Menu View > rayCloud > Right sidebar > Objects.
3. (optional) Select the Generate DSM box to generate a DSM.
4. Select the file path where the orthomosaic will be stored.
5. Click Generate.

Note: Only one orthomosaic can be generated at a time. The generated orthomosaic is not georeferenced.

Important: If the generated orthomosaic is distorted with background information, improve the results by masking the background: How to remove the Background of the Orthoplane using the Annotation Tool .
6 out of 7 found this helpful

### Article feedback (for troubleshooting, post here)

• Sin Yang Chop

Hi, the generated ortomosaic is it to scale? in my experience it seems the photo is not to scale when I input it into autocad.

Edited by Sin Yang Chop
• Daniel (Pix4D)

Hello Sin,

The ortho generated when using an orthoplane is not georeferenced but it is scaled. It has the same scale as the project.

Regards.

• Sin Yang Chop

Hi Daniel, but when I import into autocad I did some quick measurement and it is not tally with the actual size.

• Daniel (Pix4D)

Hi again.

Is your Pix4D project scaled? By saying that I mean if you have either GCPs or a scale constraint.

Regards.

• A T

Hello,

I was wondering if there was a way to edit the facade in mosaic editor?

• Beata (Pix4D)

Hello,

No, there is no way to edit the facade in Mosaic Editor. Every change should be done prior to facade generation, for example using the Annotation Tool. More in the video above.

Regards

• Drone Metrix Drone Metrix

Hello,

I have the same problem than Sin Yang Chop.

My project is georeferenced, but the ortoplan is not at the good scale when I open it in Global Mapper...

Do you know where the problem could be?

Thanks

• Blaž (Pix4D)

Hi Ariance,

the orthoplane, i.e. the orthomosaic of a vertical or oblique surface, is not georeferenced. It is placed in an arbitrary coordinate system unlike the orthomosaic. However, the orthoplane should be scaled. Make sure that the .tfw file is correctly recognized in the software you are using.

• Robert Kay

Good afternoon

When creating an orthomosaic of a facade from my project the loading bar continually jams at 47% loading of the point cloud. Is this likely to be an issue with the graphics card/data set?

My graphics card is a Quadro M2000 and has processed the large data set very slowly throughout.

Thanks

• Blaž (Pix4D)

Hi Robert,

since the process is stuck while loading the point cloud this could indicate that the computer resources are not optimal and the point cloud might be too big.

Could you try changing the Processing Options to generate fewer 3D Points and try it again?