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Computing in Geographic Information Systems
book

Computing in Geographic Information Systems

by Narayan Panigrahi
July 2014
Intermediate to advanced content levelIntermediate to advanced
303 pages
8h 34m
English
CRC Press
Content preview from Computing in Geographic Information Systems
112 Computing in Geographic Information Systems
FIGURE 6.1
Edge surface with Gaussian curvature K = 0, λ
1
= 0 and λ
2
< 0. The princi-
pal eigenvalues are directed in orthogonal directions.
The classification of the image surface can be done using the mean gaus-
sain curvature. For elliptic surface patches the curvature is positive in any
directions i.e. K 0.
In other words if H 0 then the surface is convex.
If H 0 then the surface is concave and curvature in any direction is
negative.
For hyperbolic patches: K 0, the curvature is positive in some direction
and negative in some other direction.
For K = 0, i.e. one or both of the principal curvature ...
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Publisher Resources

ISBN: 9781482223149