Vector creation

Array of offset (parallel) lines

Creates copies of line features in a layer, by creating multiple offset versions of each feature. Each new version is incrementally offset by a specified distance.

Positive distance will offset lines to the left, and negative distances will offset them to the right.

../../../../_images/offset_lines_array.png

In blue the source layer, in red the offset one

checkbox Allows features in-place modification

Parameters

Label Name Type Description
Input layer INPUT [vector: line] Input line vector layer to use for the offsets.
Number of features to create COUNT

[number dataDefined]

Default: 10

Number of offset copies to generate for each feature
Offset step distance OFFSET

[number dataDefined]

Default: 1.0

Distance between two consecutive offset copies
Segments SEGMENTS

[number]

Default: 8

Number of line segments to use to approximate a quarter circle when creating rounded offsets
Join style JOIN_STYLE

[enumeration]

Default: 0

Specify whether round, miter or beveled joins should be used when offsetting corners in a line. One of:

  • 0 — Round
  • 1 — Miter
  • 2 — Bevel
Miter limit MITER_LIMIT

[number]

Default: 2.0

Only applicable for mitered join styles, and controls the maximum distance from the offset curve to use when creating a mitered join.
Offset lines OUTPUT

[vector: line]

Default: [Create temporary layer]

Specify the output line layer with offset features. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Offset lines OUTPUT [vector: line] Output line layer with offset features. The original features are also copied.

Array of translated features

Creates copies of features in a layer by creating multiple translated versions of each. Each copy is incrementally displaced by a preset amount in the X, Y and/or Z axis.

M values present in the geometry can also be translated.

../../../../_images/translate_array.png

Input layers in blue tones, output layers with translated features in red tones

checkbox Allows features in-place modification

Parameters

Label Name Type Description
Input layer INPUT [vector: any] Input vector layer to translate
Number of features to create COUNT

[number dataDefined]

Default: 10

Number of copies to generate for each feature
Step distance (x-axis) DELTA_X

[number dataDefined]

Default: 0.0

Displacement to apply on the X axis
Step distance (y-axis) DELTA_Y

[number dataDefined]

Default: 0.0

Displacement to apply on the Y axis
Step distance (z-axis) DELTA_Z

[number dataDefined]

Default: 0.0

Displacement to apply on the Z axis
Step distance (m values) DELTA_M

[number dataDefined]

Default: 0.0

Displacement to apply on M
Translated OUTPUT

[same as input]

Default: [Create temporary layer]

Output vector layer with translated (moved) copies of the features. The original features are also copied. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Translated OUTPUT [same as input] Output vector layer with translated (moved) copies of the features. The original features are also copied.

Create grid

Creates a vector layer with a grid covering a given extent. Grid cells can have different shapes:

../../../../_images/create_grid.png

Different grid cell shapes

The size of each element in the grid is defined using a horizontal and vertical spacing.

The CRS of the output layer must be defined.

The grid extent and the spacing values must be expressed in the coordinates and units of this CRS.

Default menu: Vector ‣ Research Tools

Parameters

Label Name Type Description
Grid type TYPE

[enumeration]

Default: 0

Shape of the grid. One of:

  • 0 — Point
  • 1 — Line
  • 2 — Rectangle (polygon)
  • 3 — Diamond (polygon)
  • 4 — Hexagon (polygon)
Grid extent EXTENT [extent] Extent of the grid
Horizontal spacing HSPACING

[number]

Default: 1.0

Size of a grid cell on the X-axis
Vertical spacing VSPACING

[number]

Default: 1.0

Size of a grid cell on the Y-axis
Horizontal overlay HOVERLAY

[number]

Default: 0.0

Overlay distance between two consecutive grid cells on the X-axis
Vertical overlay VOVERLAY

[number]

Default: 0.0

Overlay distance between two consecutive grid cells on the Y-axis
Grid CRS CRS

[crs]

Default: Project CRS

Coordinate reference system to apply to the grid
Grid OUTPUT

[vector: any]

Default: [Create temporary layer]

Resulting vector grid layer. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Grid OUTPUT [vector: any] Resulting vector grid layer. The output geometry type (point, line or polygon) depends on the Grid type.

Create points layer from table

Creates points layer from a table with columns that contain coordinates fields.

Besides X and Y coordinates you can also specify Z and M fields.

Parameters

Label Name Type Description
Input layer INPUT [vector: any] Input vector layer or a table.
X field XFIELD [tablefield: any] Field containing the X coordinate
Y field YFIELD [tablefield: any] Field containing the Y coordinate

Z field

Optional

ZFIELD [tablefield: any] Field containing the Z coordinate

M field

Optional

MFIELD [tablefield: any] Field containing the M value
Target CRS TARGET_CRS

[crs]

Default: EPSG:4326

Coordinate reference system to use for layer. The provided coordinates are assumed to be compliant.
Points from table OUTPUT

[vector: point]

Default: [Create temporary layer]

Specify the resulting point layer. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Points from table OUTPUT [vector: point] The resulting point layer

Generate points (pixel centroids) along line

Generates a point vector layer from an input raster and line layer.

The points correspond to the pixel centroids that intersect the line layer.

../../../../_images/points_centroids.png

Points of the pixel centroids

Parameters

Label Name Type Description
Raster layer INPUT_RASTER [raster] Input raster layer
Vector layer INPUT_VECTOR [vector: line] Input line vector layer
Points along line OUTPUT

[vector: point]

Default: [Create temporary layer]

Resulting point layer with pixel centroids. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Points along line OUTPUT [vector: point] Resulting point layer with pixel centroids

Generate points (pixel centroids) inside polygon

Generates a point vector layer from an input raster and polygon layer.

The points correspond to the pixel centroids that intersect the polygon layer.

../../../../_images/points_centroids_polygon.png

Points of the pixel centroids

Parameters

Label Name Type Description
Raster layer INPUT_RASTER [raster] Input raster layer
Vector layer INPUT_VECTOR [vector: polygon] Input polygon vector layer
Points inside polygons OUTPUT

[vector: point]

Default: [Create temporary layer]

Resulting point layer of pixel centroids. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Points inside polygons OUTPUT [vector: point] Resulting point layer of pixel centroids

Import geotagged photos

Creates a point layer corresponding to the geotagged locations from JPEG images from a source folder.

The point layer will contain a single PointZ feature per input file from which the geotags could be read. Any altitude information from the geotags will be used to set the point’s Z value.

Besides longitude and latitude also altitude, direction and timestamp information, if present in the photo, will be added to the point as attributes.

Parameters

Label Name Type Description
Input folder FOLDER [folder] Path to the source folder containing the geotagged photos
Scan recursively RECURSIVE

[boolean]

Default: False

If checked, the folder and its subfolders will be scanned
Photos OUTPUT

[vector: point]

Default: [Create temporary layer]

Specify the point vector layer for the geotagged photos. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Invalid photos table

Optional

INVALID

[table]

Default: [Skip output]

Specify the table of unreadable or non-geotagged photos. One of:

  • Skip Output
  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Photos OUTPUT [vector: point] Point vector layer with geotagged photos. The form of the layer is automatically filled with paths and photo previews settings.

Invalid photos table

Optional

INVALID [table] Table of unreadable or non-geotagged photos can also be created.

Points to path

Converts a point layer to a line layer, by joining points in an order defined by a field in the input point layer (if the order field is a date/time field, the format must be specified).

Points can be grouped by a field to distinguish line features.

In addition to the line vector layer, a text file is output that describes the resulting line as a start point and a sequence of bearings / directions (relative to azimuth) and distances.

Parameters

Label Name Type Description
Input point layer INPUT [vector: point] Input point vector layer
Order field ORDER_FIELD [tablefield: any] Field containing the order to connect the points in the path

Group field

Optional

GROUP_FIELD [tablefield: any] Point features of the same value in the field will be grouped in the same line. If not set, a single path is drawn with all the input points.

Date format (if order field is DateTime)

Optional

DATE_FORMAT [string] The format to use for the Order field parameter. Specify this only if the Order field is of type Date/Time.
Paths OUTPUT

[vector: line]

Default: [Create temporary layer]

Specify the line vector layer of the path. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Directory for text output OUTPUT_TEXT_DIR

[folder]

Default: [Skip output]

Specify the directory that will contain the description files of points and paths.

Outputs

Label Name Type Description
Paths OUTPUT [vector: line] Line vector layer of the path
Directory for text output OUTPUT [folder] Directory containing description files of points and paths

Random points along line

Creates a new point layer, with points placed in the lines of another layer.

For each line in the input layer, a given number of points is added to the resulting layer.

A minimum distance can be specified, to avoid points being too close to each other.

Parameters

Label Name Type Description
Input point layer INPUT [vector: line] Input line vector layer
Number of points POINTS_NUMBER

[number]

Default: 1

Number of points to create
Minimum distance between points MIN_DISTANCE

[number]

Default: 0.0

The minimum distance between points
Random points OUTPUT

[vector: point]

Default: [Create temporary layer]

The output random points. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Random points OUTPUT [vector: point] The output random points layer.

Random points in extent

Creates a new point layer with a given number of random points, all of them within a given extent.

A minimum distance can be specified, to avoid points being too close to each other.

Default menu: Vector ‣ Research Tools

Parameters

Label Name Type Description
Input extent EXTENT [extent] Map extent for the random points
Number of points POINTS_NUMBER

[number]

Default: 1

Number of point to create
Minimum distance between points MIN_DISTANCE

[number]

Default: 0.0

The minimum distance between points
Target CRS TARGET_CRS

[crs]

Default: Project CRS

CRS of the random points layer
Random points OUTPUT

[vector: point]

Default: [Create temporary layer]

The output random points. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Random points OUTPUT [vector: point] The output random points layer.

Random points in layer bounds

Creates a new point layer with a given number of random points, all of them within the extent of a given layer.

A minimum distance can be specified, to avoid points being too close to each other.

Default menu: Vector ‣ Research Tools

Parameters

Label Name Type Description
Input layer INPUT [vector: polygon] Input polygon layer defining the area
Number of points POINTS_NUMBER

[number]

Default: 1

Number of points to create
Minimum distance between points MIN_DISTANCE

[number]

Default: 0.0

The minimum distance between points
Random points OUTPUT

[vector: point]

Default: [Create temporary layer]

The output random points. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Random points OUTPUT [vector: point] The output random points layer.

Random points inside polygons

Creates a new point layer with a given number of random points inside each polygon of the input polygon layer.

Two sampling strategies are available:

  • Points count: number of points for each feature
  • Points density: density of points for each feature

A minimum distance can be specified, to avoid points being too close to each other.

Default menu: Vector ‣ Research Tools

Parameters

Label Name Type Description
Input layer INPUT [vector: polygon] Input polygon polygon vector layer
Sampling strategy STRATEGY

[enumeration]

Default: 0

Sampling strategy to use. One of:

  • 0 — Points count: number of points for each feature
  • 1 — Points density: density of points for each feature
Expression EXPRESSION

[number dataDefined]

Default: 1.0

The number or density of points, depending on the chosen Sampling strategy.
Minimum distance between points MIN_DISTANCE

[number]

Default: 0.0

The minimum distance between points
Random points OUTPUT

[vector: point]

Default: [Create temporary layer]

The output random points. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Random points OUTPUT [vector: point] The output random points layer.

Raster pixels to points

Creates a vector layer of points corresponding to each pixel in a raster layer.

Converts a raster layer to a vector layer, by creating point features for each individual pixel’s center in the raster layer. Any nodata pixels are skipped in the output.

Parameters

Label Name Type Description
Raster layer INPUT_RASTER [raster] Input raster layer
Band number RASTER_BAND [raster band] Raster band to extract data from
Field name FIELD_NAME

[string]

Default: “VALUE”

Name of the field to store the raster band value
Vector points OUTPUT

[vector: point]

Default: [Create temporary layer]

Specify the resulting point layer of pixels centroids. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Vector points OUTPUT [vector: point] Resulting point layer with pixels centroids

Raster pixels to polygons

Creates a vector layer of polygons corresponding to each pixel in a raster layer.

Converts a raster layer to a vector layer, by creating polygon features for each individual pixel’s extent in the raster layer. Any nodata pixels are skipped in the output.

Parameters

Label Name Type Description
Raster layer INPUT_RASTER [raster] Input raster layer
Band number RASTER_BAND [raster band] Raster band to extract data from
Field name FIELD_NAME

[string]

Default: “VALUE”

Name of the field to store the raster band value
Vector polygons OUTPUT

[vector: polygon]

Default: [Create temporary layer]

Specify the resulting polygon layer of pixel extents. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Vector polygons OUTPUT [vector polygon] Resulting polygon layer of pixel extents

Regular points

Creates a new point layer with its points placed in a regular grid within a given extent.

The grid is specified either by the spacing between the points (same spacing for all dimensions) or by the number of points to generate. In the latter case, the spacing will be determined from the extent. In order to generate a full rectangulare grid, at least the number of points specified by the user is generated for the latter case.

Random offsets to the point spacing can be applied, resulting in a non-regular point pattern.

Default menu: Vector ‣ Research Tools

Parameters

Label Name Type Description
Input extent (xmin, xmax, ymin, ymax) EXTENT [extent] Map extent for the random points
Point spacing/count SPACING

[number]

Default: 100

Spacing between the points, or the number of points, depending on whether Use point spacing is checked or not.
Initial inset from corner (LH side) INSET

[number]

Default: 0.0

Offset the points relative to the upper left corner. The value is used for both the X and Y axis.
Apply random offset to point spacing RANDOMIZE

[boolean]

Default: False

If checked the points will have a random spacing
Use point spacing IS_SPACING

[boolean]

Default: True

If unchecked the point spacing is not taken into account
Output layer CRS CRS

[crs]

Default: Project CRS

CRS of the random points layer
Regular points OUTPUT

[vector: point]

Default: [Create temporary layer]

Specify the output regular point layer. One of:

  • Create Temporary Layer (TEMPORARY_OUTPUT)
  • Save to File…
  • Save to Geopackage…
  • Save to PostGIS Table

The file encoding can also be changed here.

Outputs

Label Name Type Description
Regular points OUTPUT [vector: point] The output regular point layer.