OGRLINEREF(1)

NAME
ogrlineref - Create linear reference and provide some calculations using it.

SYNOPSIS

    ogrlineref [--help] [--help-general] [-progress] [-quiet]
               [-f <format_name>] [-dsco <NAME>=<VALUE>]... [-lco <NAME>=<VALUE>]...
               [-create]
               [-l <src_line_datasource_name>] [-ln <layer_name>] [-lf <field_name>]
               [-p <src_repers_datasource_name>] [-pn <layer_name>] [-pm <pos_field_name>] [-pf <field_name>]
               [-r <src_parts_datasource_name>] [-rn <layer_name>]
               [-o <dst_datasource_name>] [-on <layer_name>] [-of <field_name>] [-s <step>]
               [-get_pos] [-x <long>] [-y <lat>]
               [-get_coord] [-m <position>]
               [-get_subline] [-mb <position>] [-me <position>]

DESCRIPTION

The ogrlineref program can be used to:

•   create a linear reference file from input data

•   return the "linear referenced" distance for the projection of the input coordinates (point) on the path

•   return the coordinates (point) on the path according to the "linear referenced" distance

•   return the portion of the path according to the "linear referenced" begin and end distances

    The ogrlineref utility creates a linear reference - a file containing segments of a certain length (e.g. 1 km in reference units.) The user can get coordinates, linear referenced distances or sublines (subpaths) from this file. The utility does not require the M or Z components in the geometry. The results can be stored in any OGR supported format. Also some information is written to the stdout.

--help
    Show this help message and exit

--help-general
    Gives a brief usage message for the generic GDAL commandline options and exit.

-progress
    Show progress.

-quiet
    Suppress all messages except errors and results.

-f <format_name>
    Select an output format name. The default is to create a shapefile.

-dsco <NAME>=<VALUE>
    Dataset creation option (format specific)

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

-create
    Create the linear reference file (linestring of parts).

-l <src_line_datasource_name>
    The path to input linestring datasource (e.g. the road)

-ln <layer_name>
    The layer name in datasource

-lf <field_name>
    The field name of unique values to separate the input lines (e.g. the set of roads).

-p <src_repers_datasource_name>
    The path to linear references points (e.g. the road mile-stones)

-pn <layer_name>
    The layer name in datasource

-pm <pos_field_name>
    The field name of distances along path (e.g. mile-stones values)

-pf <field_name>
    The field name of unique values to map input reference points to lines.

-r <src_parts_datasource_name>
    The path to linear reference file.

-rn <layer_name>
    The layer name in datasource

-o <dst_datasource_name>
    The path to output linear reference file (linestring datasource)

-on <layer_name>
    The layer name in datasource

-of <field_name>
    The field name for storing the unique values of input lines

-s <step>
    The part size in linear units

-get_pos
    Return linear referenced position for input X, Y

-x <long>
    Input X coordinate

-y <lat>
    Input Y coordinate

-get_coord
    Return point on path for input linear distance

-m <position>
    The input linear distance

-get_subline
    Return the portion of the input path from and to input linear positions.

-mb <position>
    The input begin linear distance

-me <position>
    The input end linear distance

EXAMPLES

  Example 1

This example would create a shapefile (parts.shp) containing a data needed for linear referencing (1 km parts):

    ogrlineref -create -l roads.shp -p references.shp -pm dist -o parts.shp -s 1000 -progress

AUTHOR
Dmitry Baryshnikov <polimax@mail.ru>

COPYRIGHT
1998-2026