Editing Straight-line diagram

{{redirect|Strip map|the method of archaeological excavation|Strip map and sample}}
{{no footnotes|date=April 2013}}
[[File:Piccadilly.gif|thumb|upright|This straight line diagram illustrates the stops on the Piccadilly Line, part of London's Underground.]]
[[File:Piccadilly Line.png|thumb|right|This is a more accurately rendered map of the Piccadilly Line, showing curvature and the relative distance between stops. It illustrates why straight-line maps are more useful when only the sequence of stops is relevant.]]

A '''straight-line diagram''' (abbreviated '''SLD''') is a diagram of a road where the road is shown as a [[straight line]]. Such diagrams are usually produced by a highway department, and display features along the road, including bridges and intersecting roads. Rows below the diagram show data about the road, usually including speed limit, number of lanes, bridge numbers, and historical data, among other data. Subway lines also frequently employ straight-line diagrams. An internal SLD viewing system may also include links to other internal data, including photos or plans. Public SLDs are distributed in formats including [[portable document format|PDF]] and [[tagged image file format|TIFF]].

Straight-line diagrams were historically used in [[transportation planning]] but have been supplanted for these purposes by [[geographic information system]]s.<ref>{{cite web|title=Straight-Line Diagrams|publisher=[[North Carolina Department of Transportation]]|location=Raleigh, North Carolina|accessdate=July 30, 2022|url=https://connect.ncdot.gov/resources/State-Mapping/Pages/Straight-Line-Diagrams.aspx}}</ref>

A '''strip map''' is a [[road map]] laid out similarly to a straight-line diagram, featuring the same details found in more conventional road maps rather than technical details. In the United States, some strip maps are distributed by state highway departments.<ref>{{cite map|inset=Alabama Interstate Highway System|title=Official Alabama Highway Map|location=Montgomery, Alabama|publisher=[[Alabama Department of Transportation]]|date=2021|accessdate=July 30, 2022|at=Reverse side|url=https://www.dot.state.al.us/maps/pdf/ALHighwayMapBack.pdf}}</ref> In Australia, strip maps are distributed by state automobile associations. In the early 20th century, scrolling strip maps were also a component of some forerunners to [[satellite navigation device]]s. One wristwatch introduced in 1927 came with strip maps to be scrolled by hand. The 1932 [[Iter-Avto]] was a car-mounted device that scrolled the strip map automatically based on [[dead reckoning]] with the [[speedometer]].<ref>{{cite web|title=Analog GPS: Scrolling Wrist & Car-Mounted Maps of the Roaring 20s & 30s|first=Kurt|last=Kohlstedt|work=[[99% Invisible]]|date=February 29, 2016|accessdate=July 30, 2022|url=https://99percentinvisible.org/article/analog-gps-scrolling-wrist-car-mounted-maps-roaring-20s-30s/}}</ref>

==Gallery==
{{gallery
|File:Ogilby - The Road From LONDON to the LANDS END (1675).jpg
 |"The Road From London to the Lands End" from [[Ogilby's Britannia]] (1675) 
}}

==See also==
* [[Ammassalik wooden maps]]
* [[Gantt chart]]
* [[Schematic]]
* [[Timeline]]

==References==
{{reflist}}

==External links==
{{Commons category|Strip maps (road maps)}}
*[https://dtdapps.coloradodot.info/otis/Sld Colorado Department of Transportation SLDs]
*[http://www.dot.state.fl.us/planning/statistics/sld.shtm Florida Department of Transportation SLDs]
*[http://www.state.nj.us/transportation/refdata/sldiag/ New Jersey Department of Transportation SLDs]
*[https://www.transportation.ohio.gov/programs/technical-services/transportation-information-management/sld Ohio Department of Transportation SLDs]
*[https://www.penndot.pa.gov/ProjectAndPrograms/ResearchandTesting/RoadwayManagementandTesting/Pages/RMS-Annual-SLDs-By-County.aspx Pennsylvania Department of Transportation SLDs]
*[http://www.raa.net/strip_maps.asp?TerID=329 Index of Australian strip maps at the South Australian Royal Automobile Association website]
*[http://www.raa.net/images/maps/SAMPLE-IT.pdf Sample South Australian RAA strip map from Adelaide to Clare]

[[Category:Diagrams]]
[[Category:Map types]]
[[Category:Streets and roads]]