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Drawing Transformation
Select the transformation type to convert the selected background drawing from the coordinates in the drawing to the currently used coordinate system. MAGNET Field offers three transformation types:
- By Matching Line - to select a common line on the background drawing and in the current job to transform coordinates in the drawing to the currently used coordinate system. This type is equal to localization in the horizontal plane using 2 pairs of points.
- By Matching Point - to select a common point on the background drawing and in the current job to transform coordinates in the background to the currently used coordinate system. In this dialog you can enter rotate and scale values for the background. This type is equal to grid-to-ground transformation in the horizontal plane with origin point and non-zero rotation angle.
- By Plotting Scale - to select a point in the job as origin point for background drawing rotation. In this case, the application rotates the background relatively to the top left point of the background drawing.
Drawing Transformation By Matching Line
For the transformation, the application performs the following operations:
- rotates the drawing around an origin point, the rotation angle is an azimuth of selected line in the job;
- scales the drawing; the scale factor is calculated as ratio of line length of the job to line length on the drawing.
Specify the start and end points of a line on the background drawing and start and end points of the same line in the current job:
Drawing Transformation By Matching Point
For the transformation, the application performs the following operations:
- rotates the drawing around an origin point, the user can specify a rotation angle;
- scales the drawing; the user can specify a scale factor.
Select an origin point in the drawing and matching point in the job, also specify rotation angle and scale factor:
- Click
in the Select an Origin Point field of the Drawing panel to open the Select Object From Map dialog. Using the corresponding buttons from the snap toolbar select a point on the background drawing. The selected point is used as the origin point of the transformation. 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 Next button to open the Transformation Results dialog with calculated relationship between coordinates in the drawing and the coordinate system used in the job.
Drawing Transformation By Plotting Scale
For the transformation, the application performs the following operations:
- rotates the drawing around an origin point, the user can specify a rotation angle;
- scales the drawing; 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 drawing is top left point of the background drawing:
- In the Origin Point field, specify the point in the current job to use it as the origin point for the transformation. 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 origin point.
- 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 Next button to open the Transformation Results dialog with calculated relationship between coordinates in the drawing and the coordinate system used in the job.
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