QGIS algorithm - v.net.distance

QGIS Algorithm provided by GRASS v.net.distance (grass:v.net.distance). Computes shortest distance via the network between the given sets of features.

grass_v_net_distance(
  input = qgisprocess:::qgis_default_value(),
  flayer = qgisprocess:::qgis_default_value(),
  tlayer = qgisprocess:::qgis_default_value(),
  threshold = qgisprocess:::qgis_default_value(),
  arc_type = qgisprocess:::qgis_default_value(),
  from_cats = qgisprocess:::qgis_default_value(),
  from_where = qgisprocess:::qgis_default_value(),
  to_type = qgisprocess:::qgis_default_value(),
  to_cats = qgisprocess:::qgis_default_value(),
  to_where = qgisprocess:::qgis_default_value(),
  arc_column = qgisprocess:::qgis_default_value(),
  arc_backward_column = qgisprocess:::qgis_default_value(),
  node_column = qgisprocess:::qgis_default_value(),
  .g = qgisprocess:::qgis_default_value(),
  .l = qgisprocess:::qgis_default_value(),
  output = qgisprocess:::qgis_default_value(),
  GRASS_REGION_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_SNAP_TOLERANCE_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_MIN_AREA_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_OUTPUT_TYPE_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_VECTOR_DSCO = qgisprocess:::qgis_default_value(),
  GRASS_VECTOR_LCO = qgisprocess:::qgis_default_value(),
  GRASS_VECTOR_EXPORT_NOCAT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

input

source - Input vector line layer (network). Path to a vector layer.

flayer

source - Input vector from points layer (from). Path to a vector layer.

tlayer

source - Input vector to layer (to). Path to a vector layer.

threshold

number - Threshold for connecting nodes to the network (in map unit). A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

arc_type

enum of ("line", "boundary") - Arc type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

from_cats

string - From Category values. String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

from_where

string - From WHERE conditions of SQL statement without 'where' keyword. String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

to_type

enum of ("point", "line", "boundary") - To feature type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

to_cats

string - To Category values. String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

to_where

string - To WHERE conditions of SQL statement without 'where' keyword. String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

arc_column

field - Arc forward/both direction(s) cost column (number). The name of an existing field. ; delimited list of existing field names.

arc_backward_column

field - Arc backward direction cost column (number). The name of an existing field. ; delimited list of existing field names.

node_column

field - Node cost column (number). The name of an existing field. ; delimited list of existing field names.

.g

boolean - Use geodesic calculation for longitude-latitude locations. 1 for true/yes. 0 for false/no. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression. Original algorithm parameter name: -g.

.l

boolean - Write each output path as one line, not as original input segments. 1 for true/yes. 0 for false/no. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression. Original algorithm parameter name: -l.

output

vectorDestination - Network_Distance. Path for new vector layer.

GRASS_REGION_PARAMETER

extent - GRASS GIS region extent. A comma delimited string of x min, x max, y min, y max. E.g. '4,10,101,105'. Path to a layer. The extent of the layer is used..

GRASS_SNAP_TOLERANCE_PARAMETER

number - v.in.ogr snap tolerance (-1 = no snap). A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

GRASS_MIN_AREA_PARAMETER

number - v.in.ogr min area. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

GRASS_OUTPUT_TYPE_PARAMETER

enum of ("auto", "point", "line", "area") - v.out.ogr output type. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.

GRASS_VECTOR_DSCO

string - v.out.ogr output data source options (dsco). String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

GRASS_VECTOR_LCO

string - v.out.ogr output layer options (lco). String value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

GRASS_VECTOR_EXPORT_NOCAT

boolean - Also export features without category (not labeled). Otherwise only features with category are exported. 1 for true/yes. 0 for false/no. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.

...

further parameters passed to qgisprocess::qgis_run_algorithm()

.complete_output

logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.

.quiet

logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.

.messages

logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.

Details

Outputs description

• output - outputVector - Network_Distance