Correction of geometric defects: about
Modes of correction of defects
The correction of defects can be carried out in two ways:
 automatically: using algorithms of correction / simplification of the geometry
 manually: using specific tools
Automatic correction
The automatic correction enables to correct the following geometric defects:
 superimposed points
 superimposed lines
 intersection lineline
 intersection lineface
Automatic simplification
The simplification is used to simplify or "reduce" the geometry. The algorithm of automatic simplification removes some lines and points by assembling the lines of the same type.
Only the lines of the following types can be fused:
 segments located on the tangent of the straight lines
 arcs of circle having the same angle of curve
Manual correction
The manual correction is used:
 on the one hand to correct the geometric defects by defect type
 on the other hand to simplify the geometry manually
The commands of manual correction for each defect are presented in the table below.
To correct the geometric defect …  use the software command …  Expected result 

Intersection lineline (particular case)

Cut a line on a point 
Cutting of the line with the insertion of the new point

Intersection lineline (general case)

Cut two lines on their intersection 
Cutting of two lines and insertion of the new point

Entirely superimposed lines: Partially superimposed lines: 
Cut two lines on their intersection 
Cutting and confusion of the lines 
Open wire

Extend line to point / Extend line to line 
Closing of contour by prolongation of a line and suppression of a point

Abnormal line  No software command *  
Abnormal line (value fixed by the user)

Reduce continuous lines in one line 
Fusion of the lines in one line

Abnormal face  No software command *  
Abnormal face (value fixed by the user)

Merge two lists of lines 
Confusion of the lines and removal of the face

Types of fusion
There are 3 reduce types for the command Reduce continuous lines in one line:
 Automatic
 Arc
 Segment
The choice of the reduce type depends on the types of lines. Some precautions concerning the choice of the reduce type and the type of lines to be reduced are necessary to preserve the geometry of the device.
Some examples of fusion with the different types of fusion are presented in the table below.
To reduce …  use the reduce type …  Expected result 

two lines of type Segment

Automatic / Segment 
Creation of a new line of the Segment type replacing two lines of the Segment type

two lines de type Arc

Automatic / Arc 
Creation of a new line of the Arc of circle type replacing two lines of the Arc type

a line of the Segment type and a line of the Arc type  Arc 
Creation of a new line of the Arc of circle type replacing two lines of the Segment and Arc types

a line of the Segment type and a line of the Arc type 
Segment 
Creation of a new line of the Segment type replacing two lines of the Arc and Segment types
