Geographical Space and Spatial Analysis | Lesson Summary | Alison
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Managing Geographical Space and Spatial Analysis - Lesson Summary

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Attribute Data Management and Data Exploration


Descriptive Statistics or Univariate Statistics is used for the ordinal variables and the ratio variables and it cannot be used for nominal or categorical variables.
Multivariate Statistics involves having one dependent variable but may have multiple independent variables.
Inferential Statistics makes inferences about a population from a sample. It also helps  to consider the likelihood of statements about a given parameter.
There are four types of database designs: 




 




Flat file
Hierarchical
Network
Relational






Database Management Systems (DBMS) builds and handles the GIS data sets in the attribute data.



Network Analysis


A network is an aggregation of links and nodes. It is very easy to code the data for links and put the data in for nodes so you can create attributes for the links as well as the nodes.
The connectivity of a network is represented using a connectivity matrix.
The measure of network connectivity is given by a measure c, which is known as the number of circuits that exist within a given network.
The shortest paths are identified using a Dijkstra’s algorithm.




Service or Trade Area Analysis in an Urban Area


Descriptive trade area pertains to several choices of shops to choose from.
Prescriptive service area involves decision making regarding efficient allocations between the points where a product might be in demand with respect to the supply points.
Reilly’s law identifies the trade boundaries between two establishments.
Huff’s law can code the interaction as a function alpha for different zones or different areas and then aid calculation of a ratio to find out what is the propensity of interaction, for example, between zone to a store






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