Linear referencing
 |
This article provides insufficient context for those unfamiliar with the subject. Please help improve the article with a good introductory style. (March 2010) |
Linear referencing (also called linear reference system or linear referencing system or LRS), is a reference system in which the locations of features are identified by a relative measure along a linear element, for example a milestone along a road. Each feature is located by either a point (known as a "milepoint") or a line ("segment"). The system is designed so that if a segment of a route is changed only those milepoints on the changed segment need to be updated.
Linear referencing is suitable for management of data related to linear features like roads, railways, oil and gas transmission pipelines, power and data transmission lines, and rivers.
A system for identifying the location of pipeline features and characteristics is by measuring distance from the start of the pipeline. An example linear reference address is: Engineering Station 1145 + 86 on pipeline Alpha = 114,586 feet from the start of the pipeline. With a reroute, cumulative stationing might not be the same as engineering stationing, because of the addition of the extra pipeline. Linear referencing solves this dilemma.
[edit] Supported platforms
Linear referencing is supported for example by several Geographic Information System software, including:
[edit] References
- ^ Benefits "Error: no
|title=specified when using {{Cite web}}". http://www.gedigitalenergy.com/geospatial/catalog/smallworld_trans.htm?TopicName=Key Benefits. - ^ Esri (24 February 2009). "ArcGIS 9.3: An overview of linear referencing". Esri. http://webhelp.esri.com/arcgiSDEsktop/9.3/index.cfm?TopicName=An_overview_of_linear_referencing. Retrieved 8 March 2011.
- ^ Geomap Services (06 June 2011). "GEOMAP GIS 2012: Solution for linear referencing and dynamic segmentation over Autodesk, ESRI or MapInfo products". Geomap Services. http://gs-web.geomapgis.com/web1/tiki-index.php?page=Routes. Retrieved 11 November 2011.
- ^ Radim Blazek (March 2005). "Introducing the Linear Reference System in GRASS" (PDF). International Journal of Geoinformatics 1 (3). http://www.gisdevelopment.net/proceedings/fossgrass/papers/Introducing%20the%20Linear%20Reference%20System%20in%20GRASS.pdf. Retrieved 2007-05-01.
- ^ PostGIS team (2010). "PostGIS 1.5.2 Manual". http://postgis.refractions.net/documentation/manual-1.5/reference.html#Linear_Referencing. Retrieved 8 March 2011.
- Noronha, Val; Church, Richard L. (2002), Linear Referencing and Alternate Expressions of Location for Transportation, Santa Barbara, California: Vehicle Intelligence and Transportation Analysis Laboratory, National Center for Geographic Information and Analysis, http://www.ncgia.ucsb.edu/vital/research/pubs/200204-LRsynthesis.pdf, retrieved 8 March 2011
 |
This article about geography terminology is a stub. You can help Wikipedia by expanding it. |
