Geospatial predictive modeling: Difference between revisions

Revision as of 14:36, 27 July 2009

Revision as of 00:04, 13 August 2009

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{{morefootnotes|date=June 2009}}

'''Geospatial predictive modeling''' is conceptually rooted in the principle that the occurrences of

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<ref>Donald Brown, Jason Dalton, and Heidi Hoyle (2004) ''[http://www.springerlink.com/content/9k5tqr6xtb1br393/ Spatial Forecast Methods for Terrorist Events in Urban Environments]''</ref>

== Predictive Modelsmodels ==

== Predictive Models ==

There are two broad types of geospatial predictive models: deductive and inductive.

[[Image:Signature_Analyst_Assessment_of_DC.jpg|thumb|right|250px|Crime Forecast of Washington DC. Red and orange colors indicate areas of high risk. The risk assessment was generated using an inductive predictive modeling tool called Signature Analyst. Signature Analyst is used to analyze past events and predict where subsequent events are most likely to occur.]]

=== Deductive Methodmethod ===

The deductive method relies on qualitative data or a subject matter expert (SME) to describe

the relationship between event occurrences and factors that describe the environment. As a

result, the deductive process generally will rely on more subjective information. The means

that the modeler could potentially be limiting the model by only inputting a quantitynumber of factors that the human brain can comprehend.

that the human brain can comprehend.

An example of a deductive model is as follows:

SetSets of Eventsevents are typically found …

* Between 100 and 700 meters from airports.

* In the grassland land cover category.

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limited by the depth of qualitative data inputs to the model.

=== Inductive Methodmethod ===

The inductive method relies on the empirically-calculated spatial relationship between

historical or known event occurrence locations and factors that make up the environment

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==See also==

* [[Predictive Analysisanalysis]]

* [[Predictive modelling|Predictive Modeling]]

* [[Suitability Analysisanalysis]]

==References==