Extra Information

Extra Information

1. Networks and Movements

   • Thought of as transport but can be less tangible such as emails and conversations.
   • Centres are called nodes or verticies.
   • Routes can also be called edges.
   • Independent parts are called sub-graphs.
   • A completely linked set of nodes and routes is called a circuit.
   • Beta Index: way of describing a network. The total number of nodes is divided by the routes or vertices.
   • Alpha Index: comparing number of circuits with the maximum possible.

2. Centrality tells us how central or accessibly place is in the network.

3. Limitations to network anaylsis

   • Treats all routes as equally effective.
   • Disregard the actual distances of the routes.
   • They refer to planar networks.
   • There are no allowances for the quality of communications.

4. Gravity Model

   • The attractiveness of one place to another is proportional to its size and the distance separating the two places.
   • Can be used to predict the interaction between two or more places so it useful to compare against observed patterns.
   • Interaction between centres and destination, is directly proportional to the attractiveness of the destination and indirectly proportional to the friction separating them.

5. Improving a Study

   • Repeat the investigation at different times.
   • Repeat in different locations.
   • Taking a larger sample.
   • Take variables into account eg. weather.
   • Better methodology.
   • Improve equipment used.