Vectorization

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Pix4Dsurvey allows you to vectorize point clouds made with Pix4Dmapper, laser scanners, LiDAR or other third-party tools and to assign the objects to layers. You can precisely define the position of the geometry by using original images or the vertex editor. 

GIF animation of vectorization of point clouds in Pix4Dsuvey, catenary and building

Vectorization tools in Pix4Dsurvey

The following tools are available:

  • Pix4Dsurvey_select_tool_icon.png Select (default).
  • Pix4Dsurvey_marker_icon.png Marker.
  • Pix4Dsurvey_polyline_icon.png Polyline.
  • Pix4Dsurvey_polygon_icon.png Polygon.
  • Pix4Dsurvey_catenary_icon.png Catenary.

How to use vectorization tools in Pix4Dsurvey

Vectorization tools specifics:

  • Select (default): Click on the object to select it. Right-click on the object to use Move to layer or Delete geometry options. 
  • Marker: Click on a point in the 3D view to create a marker.
  • Polyline: Minimum two points need to be clicked in the 3D view to define a polyline.
  • Polygon: Minimum three points need to be clicked in the 3D view to define a polygon.
  • Catenary: For vectorization of freely hanging power lines, chains and ropes. Minimum three points need to be clicked in the 3D view.
    Tip: When vectorizing catenaries, the order of the clicks is not important. The mathematical line that represents the catenary curve will be calculated based on all clicked points.

To use the vectorization tools:

  1. Select the tool on the toolbar.
  2. Left-click on the point cloud in the 3D view to create the first vertex and to start the vectorization.
  3. Continue using left-click to add more vertices to the geometry.
  4. (Optional) Press the Esc key to cancel the vectorization. 
  5. To finish the geometry:
      • Either Right-click in the 3D view to add the last vertex and to finish the geometry.
      • Or press Enter to accept the edits and to finish the geometry.
  6. (Optional) Right-click again to exit the vectorization tool and to change to Pix4Dsurvey_select_tool_icon.png Select (default).
 
Note: When pressing Enter the current state of the geometry will be accepted and no additional vertices will be added. To speed up the vectorization, we recommend using the right-click as it adds the last vertex as well as finishes the geometry.

Editing geometry in the 3D view

To move the vertex in the 3D view:

  1. Use the Select tool to click on an object.
  2. Click on the existing geometry.
  3. Click on the vertex and drag it to the new position.
     
    Tip: To speed up the editing, move to the next vertex using the Tab shortcut.

After moving the vertex to the new position, the edits are automatically taken into account and you can continue creating new geometries or edit existing ones. 

To add a vertex to existing geometry:

  1. Use the Select tool to click on an object.
  2. Hover over the section where you would like to add the vertex.
  3. Click to create a new vertex.

To remove a vertex to existing geometry:

  1. Use the Select tool to click on an object.
  2. Click on the existing geometry.
  3. Click on the vertex and press the Delete key.

Editing geometry on images

 
Important: Only available for perspective cameras' projects processed in Pix4Dmapper. For more information see How to import a Pix4Dmapper project into Pix4Dsurvey article.

To move the vertex on the images:

  1. Use the Select tool to click on an object.
  2. Click on the vertex on the image and drag it to the new position on at least two images.
  3. Click Ctrl + Enter to accept the edits.
     
    Tip: To speed up the vectorization, accept the edits by simply clicking in the 3D view or moving to the next vertex using the Tab shortcut.
  4. (Optional) Hit the Esc key to cancel the edit.

After moving the vertex to the new position on at least two images, the position of the vertex is automatically changed and updated. 

 
Note: Vertices must be marked on at least two images. For more accurate results, it is recommended to mark the same vertex in three or more images.

Editing geometry with vertex editor

It is possible to manually adjust the coordinates of created vertexes. 

Pix4Dsurvey_vertex_editor.jpg

To move the vertex using the vertex editor:

  1. Use the Select tool to click on an object.
  2. Click on the vertex. The dialog Coordinates opens in the bottom left corner of the screen.
  3. Edit the coordinate values by:
    • Typing the new coordinate values.
    • Adjusting the coordinate values with the +/- button. 
  4. Click Ctrl + Enter to accept the edits.
     
    Tip: To speed up the vectorization, accept the edits by simply clicking in the 3D view.
  5. (Optional) Hit the Esc key to cancel the edit.
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2 comments

  • Aaron Meyer

    I like the simplicity of adding geometry.  I'm testing it on the example dataset.  Is there a way to delete a vertex without deleting the geometry?

  • Blaž (Pix4D)

    Hi Aaron, great to hear you are trying out Pix4Dsurvey.

    To delete an individual vertex you can:

    • Use the Select tool to click on an object.
    • Click on the existing geometry.
    • Click on the vertex and press the Delete key.

    Best,

     

    Edited by Blaž (Pix4D)
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