You can use the Simplify Graph tool to remove unnecessary nodes from straight sections and curves of the input streets. It operates on the current street selection or on all the streets when nothing is selected.
Segments are combined to longer straight or curved segments based on their angle in-between, except in the following cases:
- The node in-between is an intersection (valency > 2).
- Their street width is not equal.
- One of the segments to combine exceeds the set thresholds.
- Their combined length would be larger than the set maximum.
You can click Graph > Simplify Graph in the main menu to simplify streets as shown in the following images:
Simplify settings
Simplify straight sections | Straight sections are simplified. |
Straight threshold angle | Angle in degrees. Streets with a lower angle than this are combined to straight segments. Meaningful for both simplify straight sections and simplify curves. |
Simplify curves | Curves are simplified. |
Curve threshold angle | Angle in degrees. Streets with a higher angle than this form boundaries between fitted curves. Only meaningful if the Simplify curves option is checked. |
Curve threshold segment length | Maximum length of a single curve input segment. Only meaningful if the Simplify curves option is checked. |
Maximum simplified segment length | Maximum length of the output straight or curve segment. |
Examples
Below are examples of applying different simplify graph settings to the following input street:
Straight sections and curves  |  |
Straight sections only  |  |
Curves only  |  |
Curves without limits  Valid when they are shorter than the set threshold. |  |
Combined curves  |  |
Combined segments with length limited  |  |