Before the calculation of the detail points measured by the orthogonal method, you must first deter-min a transformation key using a similar procedure as for the orientation of the sets of horizontal directions in the polar method. For each point you want to use for determination of the transformation key, enter the coordinates in the entry lines under Identical points in the main and local systems (perpendicular and stationing) and add it to the list of identical points using the button (Add).
If there are at least two identical points on the list, the program will automatically calculate the transformation key and the coordinate corrections on each point. At the same time, it displays the correction of the length between the first two identical points (the difference of the length determinated from the coordinates and from the perpendicular and from the stationing). The maximum number of the identical points is not limited.
You can control the transformation key by pressing the button (Key). From the dialog window displayed by the program (it is identical for all kinds of transformations) you will probably only be interested in the part Scale coefficients (in this case a similarity transformation is used, both scale coefficients are therefore identical). This window contains the buttons (Load key) and (Save key). Using these buttons you can save the entered transformation key to the file for further use or load the previously defined key from the file.
In the calculation dialog window, the adjustment of the distance of the measuring line is automatically displayed. If more than two identical points are entered, or if it is not a free measuring line, then the adjustment of the distance of the measuring line is deemed the difference of the distances between the first two identical points.
After determining the transformation key, you can calculate the individual points in the usual way. If you have selected any of the coordinate lists as active, the program automatically stores the calculated points in it. If you do not want to save them, you have to cancel the active list before the calculation (command File->Active coordinatess list, item [None]). If you do not have an active coordinate list set (or if you also wish to save the point in another list, eventually to use it in other calculation window as an input data), you can mouse-drag it in the same way you drag the points form the coordinate lists.
By the button (New line)), you delete the content of the entire dialog window, and you can calculate another line.
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If calculating more points, and if you have the possibility to import their perpendiculars and stationing in some way to the coordinate list, you can use the coordinates' transformation for the calculation. |