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The modern name "caltrop" is derived from the Old English calcatrippe (heel-trap), [6] [7] such as in the French usage chausse-trape (shoe-trap). The Latin word tribulus originally referred to this and provides part of the modern scientific name of a plant commonly called the caltrop, Tribulus terrestris, whose spiked seed cases resemble caltrops and can injure feet and puncture bicycle tires.
The vertical exaggeration is given by: = where VS is the vertical scale and HS is the horizontal scale, both given as representative fractions.. For example, if 1 centimetre (0.39 in) vertically represents 200 metres (660 ft) and 1 centimetre (0.39 in) horizontally represents 4,000 metres (13,000 ft), the vertical exaggeration, 20×, is given by:
While use case theory suggests that UI not be reflected in use cases, it can be awkward to abstract out this aspect of design, as it makes the use cases difficult to visualize. In software engineering, this difficulty is resolved by applying requirements traceability , for example with a traceability matrix .
See also the companion subpage for test cases. Template documentation [ view ] [ edit ] [ history ] [ purge ] This template may have no transclusions , because this template is used by mw:GeoHack to display maps on pages linked from, but outside of, the English Wikipedia.
An edge case can be expected or unexpected. In engineering, the process of planning for and gracefully addressing edge cases can be a significant task, and yet this task may be overlooked or underestimated. Some common causes of edge cases [1] are: Unpredictable user behavior; Evolution of use cases (e.g. user behavior may change over time)
A use case analysis is the primary form for gathering usage requirements for a new software program or task to be completed. The primary goals of a use case analysis are: designing a system from the user's perspective, communicating system behavior in the user's terms, and specifying all externally visible behaviors.
Use case points (UCP or UCPs) is a software estimation technique used to forecast the software size for software development projects. UCP is used when the Unified Modeling Language (UML) and Rational Unified Process (RUP) methodologies are being used for the software design and development.
Use a consistent approach which over time will become instantly recognizable by the public, and Involve multiple stakeholders during development to ensure a "Best Practices" outcome. After three years of field research and vetting by multiple focus groups of trail users, responders, and geospatial experts, a design based on USNG was adopted.