Topics

1

Feature Requests / Are Estimated X,Y,Z same as Adjusted Coordinates by software?

« on: May 25, 2023, 12:19:07 PM »

*Request for very urgent and necessary guidance*

In a photogrammetry project, I have a Local Coordinate System where control and check-points are located in this system.
When I import the coordinates text file into the software and mark the points on the images, There are too much errors in the reference section.
But when I export coordinates from the same markers, there is an option called estimated values, which is them have only a few millimeters different from the original coordinates.

My question is, are these Estimated coordinates same as Adjusted coordinates by the software?
And are these Estimated coordinates reliable for measurement and use in other projects?

I will be grateful for your guidance.

2

Camera Calibration / Are Estimated X,Y,Z same as Adjusted Coordinates?

« on: May 24, 2023, 02:33:28 PM »

*Request for very urgent and necessary guidance*

In a photogrammetry project, I have a Local Coordinate System where control and check-points are located in this system.
When I import the coordinates text file into the software and mark the points on the images, There are too much errors in the reference section.
But when I export coordinates from the same markers, there is an option called estimated values, which is them have only a few millimeters different from the original coordinates.

My question is, are these Estimated coordinates same as Adjusted coordinates by the software?
And are these Estimated coordinates reliable for measurement and use in other projects?

I will be grateful for your guidance.

3

General / Estimated Coordinates

« on: March 23, 2023, 02:49:42 PM »

Hi Dears,
I have taken consecutive images of a wide area from fixed ground stations (4 stations), like panoramic images. About 14 images from each station.
In this area, I have 7 points whose coordinates are precisely known to me.
Now I have imported the images into Agisoft, I have imported the text file of coordinates of 7 points into the software, and I have selected 4 points as control points and 3 points as checkpoints, and I have marked them on all the images.
After aligning the images, the control point error is 2 cm and the checkpoint error is 5 cm, which is acceptable for our work.
But in my area, I have 15 points that I need to get their coordinates.
By marking these points on the images, their error is about meters!!!!
- My first question is, where can this error come from?
- My second question is about the estimated coordinates in the reference section. How accurate and reliable are these coordinates?
- What is the difference between estimated coordinates and original coordinates (X, Y, Z  and  X_est, Y_est, Z_est)?
- Is it possible to output the estimated coordinates and introduce them as the obtained coordinates for those 15 points?

Thank you very much in advance for your help.