Sections

Figure 3.6: Construction of Sections.

Sections of the surfaces Section may be built in this mode. It is recommended to built sections only on Height Images. To fulfill the procedure click the left button of the mouse at the point which will be starting on, and continuing pressing the button draw the section line. The section line and the window with the image of the profile across the section line will appear after the release of the button (fig. 3.6). The section line will appear on every image which is contained in the file. It is possible to observe both section profile and its spectrum. To achieve this put a tick against option Spectrum in the Menu View when the section window is active. The red line corresponds to power spectrum, the blue line -- to phase spectrum.

There are two dotted lines at the edges of the Section Window. The distances and height on the profile can be measured by moving these lines by holding left mouse button and moving the mouse. Two triangular cursors are moving along section line on the surface image, the cursors correspond to the position of dotted lines on the profile. Single right-click may change the mode of distance measurement to the mode of angle measurement and back. The values of spectrum power and phase can be obtained with similar dotted lines.

Using View/Options... menu user can choose differnt modes of Section representation on horizontal and vertical axis. There are two regimes to control horizontal axis - Fixed Width or Fixed Scale. With the first one when user change window size the section width will change as well. With the second one section width remains constant.

To control section's vertical axis user can choose menu item Auto, and this cause the profile to be scaled to fit section's frame. Or user can choose Fixed menu item and enter the size of the vertical scale manually.

The start and end point of the Section Line may be moved in the Surface Window. The content of the Section Window will be changed simultaneously in this case.