Jingyi Criterion

National Communicable Disease Quarantine Centre Land Suitability Analysis

OBJECTIVE

PROXIMITY

CRITERION

AHP

LAND SUITABILITY

To make the analysis of proximity easier and more accurate, the proximity of the results obtained need to be standardized.

Proximity to Buildings (Standardized)

A higher score (darker blue) indicates a higher suitability of the potential sites in term of health risk, this mean that sites with higher score is further away from buildings than sites with lower score and is more suitable for construction of a quarantine centre.

Proximity to Natural Features (Standardized)

Hi Hi Hi

Proximity to Roads (Standardized)

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Slope Analysis (Standardized)

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Additional Notes

I standardized the proximity of the results through the following steps:

• Normalize raster values to a range of 0 to 1 for all factor layers using raster calculator using the following standardization formula:

([Proximity- Min(Proximity)] / [Max(Proximity) - Min(Proximity)] [1] or 1 - ([Proximity- Min(Proximity)] / [Max(Proximity) - Min(Proximity)] [2]

The formula [1] is applied to buildings and natural features factors and formula [2] is applied to slopes and roads factors. This is to ensure uniform results of the criterion score, where higher score indicates higher suitability in all factors for construction of quarantine centre and vice versa.

• After normalizing and deriving the criterion score for each factor layer, I realized that the map is not clear in showing the suitability of the different factors. Therefore, I went a step further and use the function "Reclassify by table" to further standardize all the factor layers to make the analysis of proximity easier.