ogrlineref

Create linear reference and provide some calculations using it.

Synopsis

ogrlineref [--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 for:

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

--help-general

Show the usage.

-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

Example

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