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A straight-line diagram (abbreviated SLD) is a diagram of a road where the road is shown as a
Colorado Department of Transportation SLDsFlorida Department of Transportation SLDsNew Jersey Department of Transportation SLDsOhio Department of Transportation SLDsPennsylvania Department of Transportation SLDsIndex of Australian strip maps at the South Australian Royal Automobile Association websiteSample South Australian RAA strip map from Adelaide to Clare
Diagrams Map types Streets and roads
A straight-line diagram (abbreviated SLD) is a diagram of a road where the road is shown as a straight line
In geometry, a straight line, usually abbreviated line, is an infinitely long object with no width, depth, or curvature, an idealization of such physical objects as a straightedge, a taut string, or a ray of light. Lines are spaces of dimens ...
. 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 PDF
Portable document format (PDF), standardized as ISO 32000, is a file format developed by Adobe Inc., Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, computer hardware, ...
and TIFF
Tag Image File Format or Tagged Image File Format, commonly known by the abbreviations TIFF or TIF, is an image file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. TIFF is w ...
.
Straight-line diagrams were historically used in transportation planning
Transportation planning is the process of defining future policies, goals, investments, and spatial planning designs to prepare for future needs to move people and goods to destinations. As practiced today, it is a collaborative process that i ...
but have been supplanted for these purposes by geographic information system
A geographic information system (GIS) consists of integrated computer hardware and Geographic information system software, software that store, manage, Spatial analysis, analyze, edit, output, and Cartographic design, visualize Geographic data ...
s.
A strip map is a road map
A road map, route map, or street map is a map that primarily displays roads and transport links rather than physical geography, natural geographical information. It is a type of navigational map that commonly includes border, political boundar ...
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. 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
A satellite navigation (satnav) device or GPS device is a device that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).
A satnav device can determine the user's geographic coordinat ...
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
In navigation, dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix, and incorporating estimates of speed, heading (or direction or course), and elapsed time. T ...
with the speedometer
A speedometer or speed meter is a gauge (instrument), gauge that measures and displays the instantaneous speed of a vehicle. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as ...
.
Gallery
See also
* Ammassalik wooden maps *Gantt chart
A Gantt chart is a bar chart that illustrates a schedule (project management), project schedule. It was designed and popularized by Henry Gantt around the years 1910–1915. Modern Gantt charts also show the Dependency (project management), depe ...
* Schematic
A schematic, or schematic diagram, is a designed representation of the elements of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details that are not relevant to the key information the sc ...
* Timeline
A timeline is a list of events displayed in chronological order. It is typically a graphic design showing a long bar labelled with dates paralleling it, and usually contemporaneous events.
Timelines can use any suitable scale representing t ...
References
External links
{{Commons category, Strip maps (road maps)Colorado Department of Transportation SLDs
Diagrams Map types Streets and roads