Returns all the edges or parts of edges of a network that can be reached within a distance or a time, starting from a point layer. This allows evaluation of accessibility within a network, eg what are the places I can navigate to on a road network without spending cost greater than a given value (the cost can be distance or time).

`Vector layer representing the network`

[vector: line]- Line vector layer representing the network to be covered.
`Vector layer with start points`

[vector: point]- Point vector layer whose features are used as start points to generate the service areas.
`Path type to calculate`

[enumeration]The type of path to calculate.

Options are:

- 0 — Shortest
- 1 — Fastest

Default:

*0*`Travel cost`

[number]The value is estimated as a distance (in the network layer units) when looking for the

*Shortest*path and as time (in seconds) for the*Fastest*path.Default:

*0.0*`Paramètres avancés`

`Direction field`

[tablefield: string]Optional

The field used to specify directions for the network edges.

The values used in this field are specified with the three parameters

`Value for forward direction`

,`Value for backward direction`

and`Value for both directions`

. Forward and reverse directions correspond to a one-way edge, « both directions » indicates a two-way edge.If a feature does not have a value in this field, or no field is set then the default direction setting (provided with the

`Default direction`

parameter) is used.`Value for forward direction`

[string]Optional

Value set in the direction field to identify edges with a forward direction.

`Value for backward direction`

[string]Optional

Value set in the direction field to identify edges with a backward direction.

`Value for both directions`

[string]Optional

Value set in the direction field to identify bidirectional edges.

`Default direction`

[enumeration]If a feature has no value set in the direction field or if no direction field is set, then this direction value is used.

Available options are:

- 0 — Forward direction
- 1 — Backward direction
- 2 — Both directions

Default:

*2*`Speed field`

[tablefield: string]Optional

Field providing the speed value (in

`km/h`

) for the edges of the network when looking for the fastest path.If a feature does not have a value in this field, or no field is set then the default speed value (provided with the

`Default speed`

parameter) is used.`Default speed (km/h)`

[number]Value to use to calculate the travel time if no speed field is provided for an edge.

Default:

*5.0*`Topology tolerance`

[number]Two lines with nodes closer than the specified tolerance are considered connected.

Default:

*0.0*`Include upper/lower bound points`

[boolean]Creates a point layer output with two points for each edge at the boundaries of the service area. One point is the start of that edge, the other is the end.

Default:

*False*

`Service area (lines)`

[vector: line]- Line layer representing the parts of the network that can be serviced by the start points.
`Service area (boundary nodes)`

[vector: point]- Point layer representing the furthest points on the network from the start points, for the given cost.

Returns all the edges or parts of edges of a network that can be reached within a given distance or time, starting from a point feature. This allows the evaluation of accessibility within a network, eg what are the places I can navigate to on a road network without spending a cost greater than a given value (the cost can be distance or time).

`Vector layer representing the network`

[vector: line]- Line vector layer representing the network to be covered.
`Start point (x, y)`

[coordinates]- Coordinate of the point to calculate the service area around.
`Path type to calculate`

[enumeration]The type of path to calculate.

Options are:

- 0 — Shortest
- 1 — Fastest

Default:

*0*`Travel cost`

[number]The value is estimated as a distance (in the network layer units) when looking for the

*Shortest*path and as time (in seconds) for the*Fastest*path.Default:

*0.0*`Paramètres avancés`

`Direction field`

[tablefield: string]Optional

The field used to specify directions for the network edges.

The values used in this field are specified with the three parameters

`Value for forward direction`

,`Value for backward direction`

and`Value for both directions`

. Forward and reverse directions correspond to a one-way edge, « both directions » indicates a two-way edge.If a feature does not have a value in this field, or no field is set then the default direction setting (provided with the

`Default direction`

parameter) is used.`Value for forward direction`

[string]Optional

Value set in the direction field to identify edges with a forward direction.

`Value for backward direction`

[string]Optional

Value set in the direction field to identify edges with a backward direction.

`Value for both directions`

[string]Optional

Value set in the direction field to identify bidirectional edges.

`Default direction`

[enumeration]If a feature has no value set in the direction field or if no direction field is set, then this direction value is used.

Available options are:

- 0 — Forward direction
- 1 — Backward direction
- 2 — Both directions

Default:

*2*`Speed field`

[tablefield: string]Optional

Field providing the speed value (in

`km/h`

) for the edges of the network when looking for the fastest path.If a feature does not have a value in this field, or no field is set then the default speed value (provided with the

`Default speed`

parameter) is used.`Default speed (km/h)`

[number]Value to use to calculate the travel time if no speed field is provided for an edge.

Default:

*5.0*`Topology tolerance`

[number]Two lines with nodes closer than the specified tolerance are considered connected.

Default:

*0.0*`Include upper/lower bound points`

[boolean]Creates a point layer output with two points for each edge at the boundaries of the service area. One point is the start of that edge, the other is the end.

Default:

*False*

`Service area (lines)`

[vector: line]- Line layer representing the parts of the network that can be serviced by the start point.
`Service area (boundary nodes)`

[vector: point]- Point layer representing the furthest points on the network from the start point, for the given cost.

Computes the optimal (shortest or fastest) routes from multiple start points defined by a vector layer and a given end point.

`Vector layer representing the network`

[vector: line]- Line vector layer representing the network to be covered.
`Path type to calculate`

[enumeration]The type of path to calculate.

Options are:

- 0 — Shortest
- 1 — Fastest

Default:

*0*`Vector layer with start points`

[vector: point]- Point vector layer whose features are used as start points of the routes.
`End point (x, y)`

[coordinates]- Point feature representing the end point of the routes.
`Paramètres avancés`

`Direction field`

[tablefield: string]Optional

The field used to specify directions for the network edges.

The values used in this field are specified with the three parameters

`Value for forward direction`

,`Value for backward direction`

and`Value for both directions`

. Forward and reverse directions correspond to a one-way edge, « both directions » indicates a two-way edge.If a feature does not have a value in this field, or no field is set then the default direction setting (provided with the

`Default direction`

parameter) is used.`Value for forward direction`

[string]Optional

Value set in the direction field to identify edges with a forward direction.

`Value for backward direction`

[string]Optional

Value set in the direction field to identify edges with a backward direction.

`Value for both directions`

[string]Optional

Value set in the direction field to identify bidirectional edges.

`Default direction`

[enumeration]If a feature has no value set in the direction field or if no direction field is set, then this direction value is used.

Available options are:

- 0 — Forward direction
- 1 — Backward direction
- 2 — Both directions

Default:

*2*`Speed field`

[tablefield: string]Optional

Field providing the speed value (in

`km/h`

) for the edges of the network when looking for the fastest path.If a feature does not have a value in this field, or no field is set then the default speed value (provided with the

`Default speed`

parameter) is used.`Default speed (km/h)`

[number]Value to use to calculate the travel time if no speed field is provided for an edge.

Default:

*50.0*`Topology tolerance`

[number]Two lines with nodes closer than the specified tolerance are considered connected.

Default:

*0.0*

`Shortest path`

[vector: line]- Line layer of the shortest or fastest path from each of the start points to the end point.

Computes the optimal (shortest or fastest) routes between a given start point and multiple end points defined by a point vector layer.

`Vector layer representing the network`

[vector: line]- Line vector layer representing the network to be covered.
`Path type to calculate`

[enumeration]The type of path to calculate.

Options are:

- 0 — Shortest
- 1 — Fastest

Default:

*0*`Start point (x, y)`

[coordinates]- Point feature representing the start point of the routes.
`Vector layer with end points`

[vector: point]- Point vector layer whose features are used as end points of the routes.
`Paramètres avancés`

`Direction field`

[tablefield: string]Optional

The field used to specify directions for the network edges.

`Value for forward direction`

,`Value for backward direction`

and`Value for both directions`

. Forward and reverse directions correspond to a one-way edge, « both directions » indicates a two-way edge.`Default direction`

parameter) is used.`Value for forward direction`

[string]Optional

Value set in the direction field to identify edges with a forward direction.

`Value for backward direction`

[string]Optional

Value set in the direction field to identify edges with a backward direction.

`Value for both directions`

[string]Optional

Value set in the direction field to identify bidirectional edges.

`Default direction`

[enumeration]Available options are:

- 0 — Forward direction
- 1 — Backward direction
- 2 — Both directions

Default:

*2*`Speed field`

[tablefield: string]Optional

`km/h`

) for the edges of the network when looking for the fastest path.`Default speed`

parameter) is used.`Default speed (km/h)`

[number]Value to use to calculate the travel time if no speed field is provided for an edge.

Default:

*50.0*`Topology tolerance`

[number]Two lines with nodes closer than the specified tolerance are considered connected.

Default:

*0.0*

`Shortest path`

[vector: line]- Line layer of the shortest or fastest path from the start point to each of the end points.

Computes the optimal (shortest or fastest) route between a given start point and a given end point.

`Vector layer representing the network`

[vector: line]- Line vector layer representing the network to be covered.
`Path type to calculate`

[enumeration]The type of path to calculate.

Options are:

- 0 — Shortest
- 1 — Fastest

Default:

*0*`Start point (x, y)`

[coordinates]- Point feature representing the start point of the route.
`End point (x, y)`

[coordinates]- Point feature representing the end point of the route.
`Paramètres avancés`

`Direction field`

[tablefield: string]Optional

The field used to specify directions for the network edges.

`Value for forward direction`

,`Value for backward direction`

and`Value for both directions`

. Forward and reverse directions correspond to a one-way edge, « both directions » indicates a two-way edge.`Default direction`

parameter) is used.`Value for forward direction`

[string]Optional

Value set in the direction field to identify edges with a forward direction.

`Value for backward direction`

[string]Optional

Value set in the direction field to identify edges with a backward direction.

`Value for both directions`

[string]Optional

Value set in the direction field to identify bidirectional edges.

`Default direction`

[enumeration]Available options are:

- 0 — Forward direction
- 1 — Backward direction
- 2 — Both directions

Default:

*2*`Speed field`

[tablefield: string]Optional

`km/h`

) for the edges of the network when looking for the fastest path.`Default speed`

parameter) is used.`Default speed (km/h)`

[number]Value to use to calculate the travel time if no speed field is provided for an edge.

Default:

*50.0*`Topology tolerance`

[number]Two lines with nodes closer than the specified tolerance are considered connected.

Default:

*0.0*

`Shortest path`

[vector: line]- Line layer of the shortest or fastest path from the start point to the end point.