Distances between display objects can be approximated by inserting a measure line on the display. A measure line is similar to a background line. It can be drawn as a straight line between two points or as a line with many vertices and segments. By default, a measure line is drawn as a yellow line with a pixel thickness of 4.

Visiblelightwavelength

Once the measure line has been added to the display, the length of the line can be displayed by right-clicking on the line and selecting Measure Length… from the local menu. The units of the length are dependent on the map projection in use and whether the option to Show longitude,latitude coordinates when showing x,y coordinates is checked on the Oneline Display Options dialog. If the map projection in use is something other than x,y and the option to show longitude,latitude coordinates is checked, the length will be given in miles and kilometers. Otherwise, the length will be given in Simulator units. The Great Circle Distance calculation is used to determine the distance between vertices on the line to determine the approximate length in miles and kilometers.

Notes for reflection oflight

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To change the shape of the line, first left click on the line to select it. Handles will appear at each vertex. A vertex can be moved by holding the left mouse button down and dragging the vertex to a new location. To remove a vertex, hold down the CTRL key and then click the vertex you would like to delete. To add a vertex, hold down the CTRL key and then click on the line where the new vertex should be added. Note that freehand lines are nothing more than a continuous series of vertices.

To insert a measure line go to the Onelines ribbon tab, then on the Active ribbon group choose GIS Tools > Insert Measure Line. Then position the mouse cursor on the display where the line should begin and click and release the left mouse button. Move the mouse to the desired termination point of the first line segment. A straight segment will follow the mouse movements. Click and release the left mouse button to complete the line segment and to prepare for drawing the next segment, or double-click if this is the last line segment. To draw a freehand shape rather than a series of straight line segments, click and hold the left mouse button where the freehand shape begins and drag the mouse to trace the desired shape (while holding the left mouse button down). Release the left mouse button to complete the section of the freehand shape. At this point, either another freehand section or a straight line segment can be added. When all desired freehand and straight line segments have been added, double-click the left mouse button to complete the line.