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Point Cloud Transformation
Select the transformation type to convert the selected point cloud from the coordinates of the point cloud to the currently used coordinate system. MAGNET Field offers three transformation types:
- By Matching Line - to select a common line in the point cloud and in the current job to transform the point cloud coordinates to the currently used coordinate system.
- By Matching Point - to select a common point in the point cloud and in the current job to transform the point cloud coordinates to the currently used coordinate system. Additionally, you enter rotate angle and scale values for the point cloud.
- By Plotting Scale - to select a point in the job as an origin point for point cloud rotation. Additionally, you enter rotate angle and scale values for the point cloud. In this case, the application will rotate the point cloud relatively to the top left point of the point cloud.
Point Cloud Transformation By Matching Line
For this type of transformation, MAGNET Field performs the following operations:
- rotates the point cloud around an origin point, the rotation angle is an azimuth of selected line in the job;
- scales the point cloud; the scale factor is calculated as ratio of line length of the job to line length in the point cloud.
Specify the start and end points of a line in the point cloud and start and end points of the same line in the current job:
Point Cloud Transformation By Matching Point
For this type of transformation, MAGNET Field performs the following operations:
- rotates the point cloud around an origin point, the user can specify a rotation angle;
- scales the point cloud; the user can specify a scale factor.
Select an origin point in the point cloud and matching point in the job, also specify rotation angle and scale factor:
- Click
in the Select an Origin Point field of the Point Cloud panel to open the Select Object From Map dialog.
- Select the point of the point cloud to use it as the origin point of the transformation:
- Click on a point of the point cloud to define the required origin point.
- The orange dot confirms the origin point selection.
- Click
to save the selection. The Select Object From Map dialog is closed and the Select an Origin Point field displays "Point Selected".
- In the Origin Point field of the Job Data panel, specify the same point in the current job. You can select it from the map
or from the list
of job points, or you can measure its coordinates by clicking
(for GNSS device type) or
(for optical device type).
- In the Rotation field enter the value of the rotation angle. Clicking the
button opens the Compute Azimuth / Bearing dialog to calculate the value based on existing job points and lines.
- In the Scale Factor specify the value of scale factor. The value should be greater than 0.
- Click the Save button to save the calculated transformation parameters between coordinates in the point cloud and the coordinate system used in the job..
Point Cloud Transformation By Plotting Scale
For this type of transformation, MAGNET Field performs the following operations:
- rotates the point cloud around an origin point, the user can specify a rotation angle (azimuthal only);
- scales the point cloud; the user can specify a scale factor.
Select an origin point in the job, also specify rotation angle and scale factor. By default, the origin point of the point cloud is its top left point:
- In the Origin Point field, specify the point in the current job. You can select it from the map
or from the list
of job points, or you can measure its coordinates by clicking
(for GNSS device type) or
(for optical device type). If you did not select an origin point from the job, the application will use a point with plane coordinates (0;0) as the origin point.
- In the Rotation field enter the value of the rotation angle (azimuthal only). Clicking the
button opens the Compute Azimuth / Bearing dialog to calculate the value based on existing job points and lines.
- In the Scale Factor specify the value of scale factor. The value should be greater than 0.
- Click the Save button to save the calculated transformation parameters between coordinates in the point cloud and the coordinate system used in the job.
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