WxGUI Vector Digitizer

This page covers core functionality of wxGUI vector digitizer, explains it's usage for newcomers.

• manual page - wxGUI.Vector_Digitizer
• see also GRASS Digitizing tool

Global mouse buttons functionality

• Left
  • Do something related to the selected functionality
• Control-Left
  • Undo something related to the selected functionality
• Middle scrolling
  • Zooming
• Middle
  • Panning
• Right
• Confirm changes

Adding new features

Point

Mouse buttons functionality:

• Left
  • Add new point on given position

wxGUI vector digitizer - add new point and define it's attributes

Line

Mouse buttons functionality:

• Left
  • Add new vertex on given position
• Right
  • Write out the new line with given number of vertices
• Control+Left
  • Remove last added vertex from the line

wxGUI vector digitizer - add new line and define it's attributes

Boundary

Mouse buttons functionality:

• Left
  • Add new vertex on given position
• Right
  • Write out the new boundary with given number of vertices
• Control+Left
  • Remove last added vertex from the boundary

wxGUI vector digitizer - add new boundary and define it's attributes

Centroid

Mouse buttons functionality:

• Left
  • Add new centroid on given position

wxGUI vector digitizer - add new centroid and define it's attributes

Area

This functionality combines adding new boundary without category and optionally centroid(s) with category defining new area(s). If the newly added boundary defines an area or two areas on the left and right from the boundary it will also add new centroid(s) which define the newly created area(s).

Mouse buttons functionality:

• Left
  • Add new vertex on given position
• Right
  • Write out the new boundary with given number of vertices
• Control+Left
  • Remove last added vertex from the boundary

wxGUI vector digitizer - add new area and define it's attributes

Modifying linear features

This functionality covers linear features (lines and boundaries).

Vertex

Add

Add new vertex to the linear feature (line or boundary). This operation won't change the shape of the selected feature.

Mouse buttons functionality:

• Left
  • Place new vertex in given select threshold
• Right
  • Rewrite selected feature with newly added vertex
• Control+Left
  • Undo (do not add new vertex)

File:Wxgui-vdigit-add-vertex.png

wxGUI vector digitizer - place new vertex to the linear feature

Remove

Remove selected vertex from the linear feature (line or boundary). This operation will change the shape of the selected feature.

Mouse buttons functionality:

• Left
  • Select vertex to be removed in given select threshold
• Right
  • Remove vertex, rewrite the feature
• Control+Left
  • Undo (do not remove vertex)

File:Wxgui-vdigit-delete-vertex.png

wxGUI vector digitizer - remove vertex from the linear feature