Entity Vectorization

This function provides a variety of vectorization operations for different entities (such as point, line, circle, polyline, and polygon entities) as well as providing specific editing functions for polyline and polygon.

Note: For the point layer, users can only add point entities except the lines, circles, polylines, and polygons. For the line layer, users cannot add point entities, but can add lines, circles, polylines, and polygons.

Point

Draw the entity point by clicking the left mouse button. The steps are shown as follows.

  1. Left-click the mouse to pick the point position.
  2. Repeat step 1 to draw the next point entity.
  3. Right-click the mouse to end drawing.

Line

Draw the line segment entity, click the left mouse button to pick the beginning and ending point of the line segment entity. The steps are shown below.

  1. Left-click the mouse to select the starting point of the line segment entity or click the right mouse button to cancel.
  2. Left-click the mouse to select the ending point of the line segment or click the right mouse button to back to step 1.
  3. Right-click the mouse to end drawing.

Circle

There are four ways to create a circle entity, including a central point, two points, three points, a circle and a radius.

A Central Point

The mouse specifies the center point and the radius to create a circle entity. The steps are shown as follow.

  1. Left-click the mouse to select the center position, or click the right mouse button to cancel.
  2. Move the mouse to modify the radius of the circle, click the left mouse to make sure or click the right mouse to back to step 1.
  3. Right-click the mouse to end drawing.
Two Points

Click left mouse to specify the center point and another point on the circumference to create a circular entity. The steps are shown as follow.

  1. Left-click the mouse to select the center position, or click the right mouse button to cancel.
  2. Left-click the mouse to select point on the circumference, or click mouse right button to return to step 1.
  3. Right-click the mouse to end drawing.
Three Points

Click mouse button to select three points on the circle. The steps are shown below.

  1. Left-click the mouse to select A on the circle, or click the right mouse button to cancel.
  2. Left-click the mouse to select a point B on the circle, or click the right mouse button to return to step 1.
  3. Left-click the mouse to select a point C on the circle, or click the right mouse button to return to step 2.
  4. Right-click the mouse to end drawing.
Centre and Radius

Right-click the mouse to select the center position, with the fixed circle radius specified by users. The steps are shown as follows.

  1. Left-click the mouse to select the center position, or click the right mouse button to cancel.
  2. You can modify the radius and redo step 1.
  3. Right-click the mouse to end drawing.

Polyline

It provides a way to draw polyline, providing three types of operations to edit polyline (i.e.add node, append node, and delete node).

Draw Polyline

Draw polyline through mouse interaction, which provides three types of editing functions(i.e. add node, append node, and deleting node).

  1. Left-click the mouse to select a point, or click the right mouse button to cancel.
  2. Left-click the mouse to select one more point, or click the right mouse button to step 1.
  3. Right-click the mouse to end drawing.

Add Node

Edit polyline and add nodes by mouse interaction.

  1. Left-click the mouse to select polyline entity that you want to edit, or click the right mouse button to cancel.
  2. Left-click the mouse to add nodes at the position, or click the right mouse button to return to step 1.
  3. Right-click the mouse to end adding.

Append Node

Appending nodes at the start or end of the polyline by the mouse interaction.

  1. Left-click the mouse to select polyline that you want to edit, or click the right mouse button to cancel.
  2. Left-click the mouse to select the point, and determine the position of the inserted point according to the distance. If it is closer to the starting point, the point will be appended before the starting point, otherwise it will be appended after the end point. Users can also click the right mouse button to cancel the editing of the polyline and return to step 1.
  3. Right-click the mouse to end appending.

Delete Node

Deleting node on polyline by the mouse interaction

  1. Left-click the mouse to select polyline that you want to edit, or click the right mouse button to cancel.
  2. Left-click the mouse to select the node that you want to delete, or click the right mouse button to return to step 1.
  3. Right-click the mouse to end deleting.

Polygon

Providing three ways to draw polygons (i.e. drawing polygons, two-point rectangles, and three-point rectangles) as well as providing the ability of adding nodes and deleting nodes.

Draw Polygon

Drawing polygon by the mouse interaction.

  1. Left-click the mouse to choose a vertex of polygon, or click the right mouse button to cancel.
  2. Left-click the mouse to choose one more point, or click the right mouse button to return back to step 1.
  3. Right-click the mouse to end drawing.

Rectangle From Two Points

Select two points to draw the rectangle paralleled with the coordinate axis by mouse interaction.

  1. Left-click the mouse to select A, or click the right mouse button to cancel.
  2. Left-click the mouse to select point B, or click the mouse button to return to step 1.
  3. Right-click the mouse to end drawing.

Rectangle From Three Points

Select three points to draw the rectangle which is not paralleled with the coordinate axis by mouse interaction.

  1. Left-click the mouse to select point A, or click the right mouse button to cancel.
  2. Left-click the mouse to select point B, or click right mouse button to return to step 1.
  3. Left-click the mouse to select point C, continue to draw the next rectangle, or click right button to return to step 2.
  4. Right-click the mouse to end drawing.

Add Node

Edit polygon and add node by mouse interaction.

  1. Left-click the mouse to select the polygon that you want to edit, or click the right mouse button to cancel.
  2. Left-click the mouse to chose the location of the polygon entity and add nodes to the position. Users can also click the right mouse button to return to step 1..
  3. Right-click the mouse to end adding.

Delete Node

Edit polygon and delete node by mouse interaction

  1. Left-click the mouse to select the polygon that you want to edit, or click the right mouse button to cancel.
  2. Left-click the mouse to choose the node of the polygon entity and delete. Users can also click the right mouse button to return to step 1.
  3. Right-click the mouse to end deleting.

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