SITE MAP |
SEARCH! |
E & B GEOG |
RESOURCES |
A-Z INDEX |

Please do NOT YET connect your network exercise page to
your homepage. Please print it out, i.e. submit the assignment on
paper
(Neat + "professional", sharp pencil, please! The verbal part needs to be
typed!). Be sure that you have complied with all component requirements.
If you have created a Web page for this exercise (and you are
encouraged to so) please
identify the URL of your (not-connected) submission. Thanks!

Due: see Calendar!

**Supporting Resources:**

- Network Structures & Measures
- Matrix Multiplications
- Taaffe & Gauthier readings (see below or class agenda)
- Taaffe & Gauthier Example
- Your class notes

B D /\ / / \ / / \ / / \ / / \ / / \ / /____________\/ A C

Introduce directions into the graph ABCD so that you can reach B directly from A (C from B and A from C) , but not A from B (B from C, and C from A). Only the link CD remains two-directional.

- What is the new diameter? Why do we need it for the determination of the accessibility matrix?
- Derive the (final) "accessibility matrix" for this new (now "directed") graph. [All calculations should be made explicit, i.e. step-by-step]
- Characterize, in detail (at least three sentences), the locational
change (change in
accessibility) of the
individual nodes
**(stress the "forward" and "backward" distinction between linkages)**. Do not hesitate to use an example for these directed interdependencies. - WITHOUT
calculating another final accessibility matrix,
describe the
**effects of the following two changes**in the network namely- the (directed) extension of the route C_D to a new node E; and .
- the addition of a new directional route from E to A.

- the
and*calculation of the accessibility matrix* - the
*accessibility characteristics of the old nodes.*

You are encouraged to use resources for both, calculations and your
interpretation, including class handouts and Gauthier & Taaffe,
*Geography of Transportation*, chapters on structural analysis of
networks (ch.5 of the 1973 edition).

Return to:
Networks ||
Geography 350 ||
Econ & Bus Geog

2002 [econgeog@u.washington.edu]