Data processing: structural design – modeling – simulation – and em – Modeling by mathematical expression
Reexamination Certificate
2006-12-19
2006-12-19
Rodriguez, Paul (Department: 2123)
Data processing: structural design, modeling, simulation, and em
Modeling by mathematical expression
C701S208000
Reexamination Certificate
active
07152022
ABSTRACT:
A method for determining the line segments, circular arcs, and clothoidal arcs that form a complex curve along a length thereof is disclosed. A ψ-s curve of the complex curve is determined, which is a plot of tangent angles, wherein the angle is made with a fixed line by a tangent to the complex curve along the length thereof. The straight line portions and parabolic portions of the plot of the ψ-s curve are determined and used to determine the corresponding circular arcs and straight lines that form the complex curve and clothoidal arcs that form the complex curve, respectively. The ψ-s curve can be used to identify the curves and straight lines that define the geometry of roads and therefore can be used to store data that indicate the geometry of roads in a geographic database that contains data representing the roads.
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Guill Russ
Kozak Frank J.
O'Brien Grace L.
Rodriguez Paul
Shutter Jon D.
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