Predictive models
There are two broad types of geospatial predictive models: deductive and inductive. The risk assessment was generated using an inductive predictive modeling tool.Deductive method
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. This means that the modeler could potentially be limiting the model by only inputting a number of factors that the human brain can comprehend. An example of a deductive model is as follows: Sets of events are typically found … * Between 100 and 700 meters from airports. * In the grassland land cover category. * At elevations between 1000 and 1500 meters. In this deductive model, high suitability locations for the set of events are constrained and influenced by non-empirically calculated spatial ranges for airports, land cover, and elevation: lower suitability areas would be everywhere else. The accuracy and detail of the deductive model is limited by the depth of qualitative data inputs to the model.Inductive method
The inductive method relies on the empirically-calculated spatial relationship between historical or known event occurrence locations and factors that make up the environment (infrastructure, socio-culture, topographic, etc.). Each event occurrence is plotted in geographic space and a quantitative relationship is defined between the event occurrence and the factors that make up the environment. The advantage of this method is that software can be developed to empirically discover – harnessing the speed of computers, which is crucial when hundreds of factors are involved – both known and unknown correlations between factors and events. Those quantitative relationship values are then processed by a statistical function to find spatial patterns that define high and low suitability areas for event occurrence.See also
* Predictive Analysis * Predictive modelling *References
{{reflist Geographic information systems Spatial analysis