Agisoft is saying pictures are 650m high, how to fix this?

[CanadianOne]

Hi everyone, when I add the 300 images from my UAV and then complete the allign process the xyz coordinates look horribly wrong when viewing the source.

the X is -118... the y is 55 and the altitude is 600 when the drone was only 40 meters high.

How do I fix this?

thanks

[Alexey Pasumansky]

Hello CanadianOne,

Can you post a couple of screenshots with source and estimated values for camera coordinates and orientation angles and alos overview of the aligned cameras?

[CanadianOne]

print screen windows

[CanadianOne]

I am trying to do a volumetric measurement and am having trouble.

Here is the camera allignment if thats what your asking

[Alexey Pasumansky]

Hello CanadianOne,

According to the screenshots there are three markers with the coordinates (0, 0, 0) if they are checked on in the Reference pane, then PhotoScan will use this coordinate information for the georeferencing.
So I suggest to uncheck them and press Update button on the Reference pane.

Also I can suggest to use version 1.2.6, if you are on some older release. There you would be able to generate DEM and perform more accurate measurements in the Ortho view mode basing on the elevation model.

[CanadianOne]

Hi Alexey,

I will try this.

I can not update as I am using a friends computer who is away for a few months and has given me instructions to not update his PC or any programs as he is annoyed with the changes it brings.

I will try to encourage him to let me update the program.

I have unchecked the markers, and have clicked update and still the same issue.

I have loaded another model I created a month ago and noticed the xyz coordinates were similar -118 and 900 meters altitude

[Alexey Pasumansky]

Hello CanadianOne,

Can you then save the project copy to PSZ format, remove the dense cloud, depth maps and mesh from it (leaving only camera alignment results) and send it to support@agisoft.com?

[CanadianOne]

Yes I will send the email now.

[Alexey Pasumansky]

Hello CanadianOne,

Thank you for providing the project file.
Actually I don't see and reference issues and high errors (like on your screenshot) in the project. All errors on the cameras are about 1 meter.
The average flying altitude is about 35 meters, according to the generated report file. The altitude values in the Reference pane should represent the height above the ellipsoid, not above the ground level, so don't see any issue in having 600 m.

Rough area measurement for the stockpile gave me about 830 sq. meters, the screenshot of the volume measurement is below:

[CanadianOne]

Hello CanadianOne,

Thank you for providing the project file.
Actually I don't see and reference issues and high errors (like on your screenshot) in the project. All errors on the cameras are about 1 meter.
The average flying altitude is about 35 meters, according to the generated report file. The altitude values in the Reference pane should represent the height above the ellipsoid, not above the ground level, so don't see any issue in having 600 m.

Rough area measurement for the stockpile gave me about 830 sq. meters, the screenshot of the volume measurement is below:

Wow interesting! Thank you for clarifying that for me!

How did you perform that measurement, How was that screen shot generated?

[Alexey Pasumansky]

Hello CanadianOne,

The screenshot is from Ortho view, that can be opened by double-clicking on the orthomosaic/DEM label in the Workspace pane. But it is a feature introduced in the version 1.2, so if you have previous version, you might not have it yet.

[CanadianOne]

Hello CanadianOne,

The screenshot is from Ortho view, that can be opened by double-clicking on the orthomosaic/DEM label in the Workspace pane. But it is a feature introduced in the version 1.2, so if you have previous version, you might not have it yet.

I am currently using a previous version without capabilities of updating it as I am not the administrator on the PC

Is there anyway to successfully perform a volumetric measurement with this version?

[CanadianOne]

I managed to update to the latest version! Wow, there are some changes, I hope my friend isnt going to be too upset.

Anyways, now what is the work flow process in order to get what you have showing in that screen shot? I see now I can generate a DEM and Ortho in the workflow tab. Thats new to me.

[Alexey Pasumansky]

Hello CanadianOne,

After building the dense cloud you can build DEM using the corresponding option in the Workflow menu, when it's generated you can open it in the Ortho view mode by double-clicking on the DEM label in the chunk's contents of the Workspace pane.

In the Orhto view mode you can draw the shapes and use measurement functionality, volume can be measured for polygonal shapes.

[CanadianOne]

Hello CanadianOne,

After building the dense cloud you can build DEM using the corresponding option in the Workflow menu, when it's generated you can open it in the Ortho view mode by double-clicking on the DEM label in the chunk's contents of the Workspace pane.

In the Orhto view mode you can draw the shapes and use measurement functionality, volume can be measured for polygonal shapes.

Excellent works great! Now when inserting scale bars, is there any need to optimize the model after the measurements of the scale bars have been created?

I am just unsure about the work flow procedure involving inserting scale bars.