NAME

       gdal-vector-segmentize - Segmentize geometries of a vector dataset

       Added in version 3.12.

SYNOPSIS

          Usage: gdal vector segmentize [OPTIONS] <INPUT> <OUTPUT> <MAX-LENGTH>

          Segmentize geometries of a vector dataset.

          Positional arguments:
            -i, --input <INPUT>                                  Input vector datasets [required]
            -o, --output <OUTPUT>                                Output vector dataset [required]
            --max-length <MAX-LENGTH>                            Maximum length of a segment [required]

          Common Options:
            -h, --help                                           Display help message and exit
            --json-usage                                         Display usage as JSON document and exit
            --config <KEY>=<VALUE>                               Configuration option [may be repeated]
            -q, --quiet                                          Quiet mode (no progress bar)

          Options:
            -l, --layer, --input-layer <INPUT-LAYER>             Input layer name(s) [may be repeated]
            -f, --of, --format, --output-format <OUTPUT-FORMAT>  Output format ("GDALG" allowed)
            --co, --creation-option <KEY>=<VALUE>                Creation option [may be repeated]
            --lco, --layer-creation-option <KEY>=<VALUE>         Layer creation option [may be repeated]
            --overwrite                                          Whether overwriting existing output is allowed
            --update                                             Whether to open existing dataset in update mode
            --overwrite-layer                                    Whether overwriting existing output is allowed
            --append                                             Whether appending to existing layer is allowed
                                                                 Mutually exclusive with --upsert
            --output-layer <OUTPUT-LAYER>                        Output layer name
            --skip-errors                                        Skip errors when writing features
            --active-layer <ACTIVE-LAYER>                        Set active layer (if not specified, all)
            --active-geometry <ACTIVE-GEOMETRY>                  Geometry field name to which to restrict the processing (if not specified, all)

          Advanced Options:
            --if, --input-format <INPUT-FORMAT>                  Input formats [may be repeated]
            --oo, --open-option <KEY>=<VALUE>                    Open options [may be repeated]
            --output-oo, --output-open-option <KEY>=<VALUE>      Output open options [may be repeated]
            --upsert                                             Upsert features (implies 'append')
                                                                 Mutually exclusive with --append

DESCRIPTION

       gdal  vector  segmentize  ensures  segments  of  LineStrings or rings of Polygons are not longer than the
       specified max length, by inserting intermediate points.

       It runs the OGRGeometry::segmentize() operation.

       It can also be used as a step of gdal vector pipeline.

   Standard options
       -f, --of, --format, --output-format <OUTPUT-FORMAT>
              Which output vector format to use. Allowed values may be given by gdal --formats | grep  vector  |
              grep rw | sort

       --co <NAME>=<VALUE>
              Many  formats  have  one  or  more  optional  dataset creation options that can be used to control
              particulars about the file created. For instance, the GeoPackage driver supports creation  options
              to control the version.

              May be repeated.

              The  dataset  creation  options  available  vary by format driver, and some simple formats have no
              creation options at all. A list of options supported for a format can be listed with the --formats
              command line option but the documentation for the format is the definitive source  of  information
              on  driver  creation options.  See Vector drivers format specific documentation for legal creation
              options for each format.

              Note that dataset creation options are different from layer creation options.

       -lco <NAME>=<VALUE>
              Layer creation option (format specific)

       --overwrite
              Allow program to overwrite existing target file or dataset.  Otherwise, by  default,  gdal  errors
              out if the target file or dataset already exists.

       --active-layer <ACTIVE-LAYER>
              Set  the  active layer. When it is specified, only the layer specified by its name will be subject
              to the processing. Other layers will be not modified.  If this option is not specified, all layers
              will be subject to the processing.

       --active-geometry <ACTIVE-GEOMETRY>
              Set the active geometry field from its name. When it is specified,  only  the  specified  geometry
              field  will  be  subject  to  the processing. Other geometry fields will be not modified.  If this
              option is not specified, all geometry fields will be subject to the processing.  This  option  can
              be combined together with --active-layer.

       --max-length <MAX-LENGTH>
              The  specified  value of this option is the maximum distance between two consecutive points of the
              output geometry before intermediate points are added.  The unit of the distance  is  georeferenced
              units of the source layer.

   Advanced options
       --oo <NAME>=<VALUE>
              Dataset open option (format specific).

              May be repeated.

       --if <format>
              Format/driver  name  to  be  attempted to open the input file(s). It is generally not necessary to
              specify it, but it can be used to skip automatic driver detection, when it  fails  to  select  the
              appropriate  driver.   This  option  can  be  repeated  several times to specify several candidate
              drivers.  Note that it does not force those drivers to  open  the  dataset.  In  particular,  some
              drivers have requirements on file extensions.

              May be repeated.

GDALG OUTPUT (ON-THE-FLY / STREAMED DATASET)

       This  program  supports  serializing  the command line as a JSON file using the GDALG output format.  The
       resulting file can then be opened as a vector dataset using the GDALG: GDAL  Streamed  Algorithm  driver,
       and apply the specified pipeline in a on-the-fly / streamed way.

EXAMPLES

   Example 1: Make sure that segments of geometries are no longer than one km (assuming the CRS is in meters)
          $ gdal vector segmentize --max-length=1000 in.gpkg out.gpkg --overwrite

AUTHOR

       Even Rouault <even.rouault@spatialys.com>

COPYRIGHT

       1998-2025

                                                  Nov 07, 2025                         GDAL-VECTOR-SEGMENTIZE(1)