@@ -229,7 +229,7 @@ There are three methods for positioning reference points:
...
@@ -229,7 +229,7 @@ There are three methods for positioning reference points:
- Click on the pixel in the image to locate the Ground Reference Point (GRP); the image coordinates **_I_** and **_J_** will then be populated.
- Click on the pixel in the image to locate the Ground Reference Point (GRP); the image coordinates **_I_** and **_J_** will then be populated.
> :thumbsup: You can zoom in for better visibility of a point. You can also delete or reorder reference points, as well as modify, copy, or paste the coordinates of reference points in the input table.
> :thumbsup: You can zoom in for better visibility of a point. You can also delete or reorder reference points, as well as modify, copy, or paste the coordinates of reference points in the input table.
Repeat this operation for all reference points (at least 4 for 2D orthorectification (ideal: 15-25 points); at least 6 for 3D orthorectification (ideal: 20-35 points); see [principles of orthorectification](#approfondissements) for more details).
Repeat this operation for all reference points (at least 4 for 2D orthorectification (ideal: 15-25 points); at least 6 for 3D orthorectification (ideal: 20-35 points); see [principles of orthorectification](#mag-the-pinhole-camera-model-and-its-solution-general-3d-case) for more details).
The **_End Entry_** button finalizes the operation and creates a file in the project directory: **_outputs.dir\\GRP.dat_**.
The **_End Entry_** button finalizes the operation and creates a file in the project directory: **_outputs.dir\\GRP.dat_**.
