Function Description

The Parallel Line command draws a parallel line with two sub-objects. In practical applications, parallel lines are mainly used to describe and compare two regular parallel Polylines, such as railways, roads, power lines, etc. Application provides By entering coordinate values and By entering the length and. Angle Two ways to draw parallel lines.

At the same time, it supports the Draw Multiple Parallels function, and meets the requirements of drawing parallel lines in different application scenarios by specifying the number of parallel lines to be drawn and the width of each parallel line.

The width between parallel lines can be increased or decreased at any time according to the Setting Step Value in the process of drawing parallel lines, which is convenient for the user to draw a continuous parallel line with different widths.

Function entrance

• Object Operation tab-> Object Drawing group-> Line-> Line-> Parallel/Parallel (length, angle)/Multiple Parallels.

Operating instructions

Draw parallel lines

Draw parallel lines by entering coordinate values

1. On the Object Operation tab, in the Object Drawing group, click the Line Drop-down Button and select the Parallel Line command. The parallel line cursor appears. The Setting Step Value dialog also appears.
2. Set the start position : Move Stop by Mouse to Map, and you can see that the coordinate value of the current mouse position will be displayed in the Parameter Input box in real time with the movement of the mouse. Enter the coordinate value of the starting point of the parallel line in this box (you can switch between the two input boxes by pressing the Tab key) and then press the Enter key to determine the starting position of the parallel line.
3. Sets the width of parallel lines : Move the mouse and input the width (length) of the parallel line in the Parameter Input box behind it, and press Enter to execute the input. Move the mouse, you can see that the width of the parallel line has been determined.

   

4. In Map, the X, Y coordinates and width values of the mouse position will be identified in real time (you can switch between the three Parameter Input boxes by pressing the Tab key). Press the Enter key to complete the coordinate value of a node under the parallel line.
5. Supports parallel line width increase by Q or + bond; parallel line width decrease by W or-bond. A parallel line is composed of two line objects. As shown in Figure 1 below, based on the ① line, the width between the ② line and the ① line is increased or decreased. Support the setting of the mode and length of step increase in the Setting Step Value dialog:
6. Setting Step Value: Setting Step Value can be set in two ways: Increase by percentage and Increase by fixed length. Users can choose according to their needs.

   

   • Increase by percentage: default to 20%, that is, the proportion of each increase and decrease of the step size is 20% of the current width. For example, if the current width is 100 meters, the current width will become 120 if you press the Q key to increase it once; When the width is increased by 20% on the basis of the width of 120, the width is 144 (120 * 20%). And so on, always growing by a percentage of the current width.
   • Increase by fixed length: Set the fixed length as the increase step length, which is 2m by default, that is, the step length is 2m for each increase or decrease. For example, the current width is 100 meters, and the current width becomes 98 meters by reducing it once with the W key. Always increase or decrease the width value by the fixed value entered.
7. Repeat steps 4-6 to complete the drawing of other segments of the parallel line. The user can change the drawing direction of the parallel line through the shortcut key Ctrl + R, and the program will automatically locate the other endpoint of the parallel line, so that the user can switch the drawing direction at any time.
   Caution:

   When drawn continuously at a fixed width, parallel lines remain parallel. When the Road Width is continuously increased or decreased, the parallel lines will no longer remain parallel. As shown in the vectorization figure below, the initial width of the road is 6m, the middle width is 9m, and the last section is the position of the intersection with uneven width. During the drawing process, the road sections from 6m to 9m are drawn as regular fixed widths, which can be kept parallel. From 9 m to 30 m, the continuous increase in width is not continuous, so the double lines drawn are not parallel.

   Vectorized road

8. Right-click to end the drawing of the parallel line.

Draw parallel lines by entering the length and angle

1. On the Object Operation tab, in the Object Drawing group, click the Line Drop-down Button and select the Parallel (length, angle) command. The parallel line cursor appears. The Setting Step Value dialog also appears.
2. Set the start position and Sets the width of parallel lines in Map , The operation is the same as step 2-3 of Draw a parallel line by inputting coordinate values.
3. After determining the starting point and width, Map will identify the length of the line between the mouse position and the starting point and the angle and width between the line and the positive direction of the X axis in real time. Enter the length and angle values in the Parameter Input box (you can switch between the two Parameter Input boxes by pressing the Tab key), and press the Enter key to confirm the length of the parallel line.
4. Setting Step Value is also supported, and its setting method is the same as Draw parallel lines by inputting coordinate values.
5. Repeat step 3 to finish drawing other line segments of the parallel line. Right-click to end the drawing of the parallel line. of the parallel line

   Enter the length and angle

Draw Multiple Parallels

Draw Multiple Parallels, that is, the user can specify the number of parallel lines drawn at the same time and set the width of each parallel line separately. For example, in the process of image vectorization, it is often encountered that roads, ditches, woodlands and other strip lands are distributed and arranged at the same time. In this case, you can use the Multiple Parallels function to draw three parallel lines of roads, ditches and woodlands at the same time. Draw multiple parallel lines at one time, which saves drawing time for users and greatly improves work efficiency. The following is a detailed description of the operation of this example:

Multiple Parallels settings

Multiple Parallels Paint Result

1. On the Object Operation tab, in the Object Drawing group, click the Line Drop-down Button and select the Multiple Parallels command. The Parameter Settings dialog pops up to set the number of parallel lines to be drawn.
2. Click the OK button to pop up the Setting Step Value dialog box. At the same time, the mouse pointer in Map is switched to the parallel line drawing state to set the starting position of the parallel line.
3. Set the width of each parallel line in turn by switching the parallel lines with Ctrl + Q or Ctrl + W. When the parallel line is a red filled area, it indicates that the width of the current parallel line can be adjusted.
4. In Map, the X, Y coordinates and width values of the mouse position will be identified in real time (you can switch between the three Parameter Input boxes by pressing the Tab key). Press the Enter key to complete the coordinate value of a node under the parallel line. It is also supported to increase the width of parallel lines by Q or + bond; W or-bond to decrease the width of parallel lines.
5. Repeat steps 3-4 to complete the drawing of other segments of the parallel line. The drawing process is the same as Draw Parallel Lines. At the same time, you can use the shortcut key Ctrl + R to change the drawing direction of the parallel line.
6. Right-click to end the drawing of the parallel line.

Shortcut key for drawing parallel lines

Shortcut key	Functional description
W、-	Decrease the step size
Q、+	Increase the step size
Ctrl+R	Parallel lines are reversed
Ctrl+Z	Step back one operation
Ctrl+P	Bring up the Setting Step Value dialog box
Ctrl+E	Displays the current width-adjustable parallel links