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by Mark Lanthier, Anil Maheshwari
In Proceedings of the 26th International Colloquium on Automata, Languages and Programming
http://www.scs.carleton.ca/~lanthier/personal/cv/icalp99.ps
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Abstract:
Abstract. We discuss the problem of computing shortest an-isotropic paths on terrains. Anisotropic path costs take into account the length of the path traveled, possibly weighted, and the direction of travel along the faces of the terrain. Considering faces to be weighted has added realism to the study of (pure) Euclidean shortest paths. Parameters such as the varied nature of the terrain, friction, or slope of each face, can be captured via face weights. Anisotropic paths add further realism by taking into consideration the direction of travel on each face thereby e.g., eliminating paths that are too steep for vehicles to travel and preventing the vehicles from turning over. Prior to this work an O(n n) time algorithm had been presented for computing anisotropic paths. Here we present the first polynomial time approximation algorithm for computing shortest anisotropic paths. Our algorithm is simple to implement and allows for the computation of shortest anisotropic paths within a desired accuracy. Our result addresses the corresponding problem posed in [13].
Citations
|
105
|
Geometric shortest paths and network optimization
– Mitchell
- 2000
|
|
80
|
On shortest paths in polyhedral spaces
– Sharir, Schorr
- 1986
|
|
66
|
The weighted region problem: finding shortest paths through a weighted planar subdivision
– MITCHELL, PAPADIMITRIOU
- 1991
|
|
44
|
Approximating weighted shortest paths on polyhedral surfaces
– Lanthier, Maheshwari, et al.
- 1997
|
|
29
|
A new algorithm for computing shortest paths in weighted planar subdivisions
– Mata, Mitchell
- 1997
|
|
24
|
An ffl-Approximation Algorithm for Weighted Shortest Paths on Polyhedral Surfaces
– Aleksandrov, Lanthier, et al.
- 1998
|
|
11
|
Optimal grid-free path planning across arbitrarily contoured terrain with anisotropic friction and gravity effects
– Rowe, Ross
- 1990
|
|
4
|
Shortest Path Problems on Polyhedral Surfaces", Ph.D. Thesis in progress
– Lanthier
- 1999
|
|
3
|
How To Take Short Cuts
– Kenyon, Kenyon
- 1992
|
|
2
|
An fflApproximation Algorithm for Weighted
– Aleksandrov, Lanthier, et al.
- 1998
|
|
2
|
Approximate Euclidean Shortest
– Choi, Sellen, et al.
- 1994
|
|
2
|
Short Cuts in Higher Dimensional Space
– Das, Narasimhan
- 1995
|
|
1
|
et al., "Strategic Directions in Computational Geometry
– Tamassia
- 1996
|
