SMT201 AY2019-20T1 EX2 Lee Yuan Kang

Gombak Subzone Area

The image above shows the 4 different views of Gombak study area.

• the study area and the target roads,
• the study area and buildings,
• the study area and the natural areas,
• the study area and digital elevation

Map view with Roads

There are many types of road in Gombak Subzone, I have filtered out the service and track roads for accessibility. Comparing the two types of roads, there are more service type roads than track types roads.

Map view with Buildings

There are different types of building in Gombak subzone. However, majority of the building types are null value hence I did not split based on types as the null types will not value add to any analysis.

Map view with Natural Areas

There are different types of natural areas and I have split them into their types, they are forests, parks and water.

Map view with Digital Elevation

I have splitted the Elevation to 5 classes The steeper the class is the more we should avoid it as the development cost will be higher.

Gombak Subzone Area (Proximity)

Proximity with Roads

I have split the raster into 5 classes in quantile, the nearer the road, the better it is, which also means more accessible. Hence the colour white will be representing a more suitable development decision

Proximity with Buildings

Similarly, the raster has been splitted into 5 classes, the further the building is the better it is for health risk factor.

Proximity with Natural Areas

Similaritly, the raster has been splitted into 5 classes again, the further the natural areas are, the better it is for conservation purpose.

Gombak Subzone Area (Criterion Scores)

For all the standarization I have deployed the formula of X = (X - Xmin)/(Xmax - Xmin)

Analytical Hierarchical Process (AHP) input matrix

Excel Screenshot

Explanation for selection

There are 4 criteria to select, they are mainly Health Risk, Natural Area, Accessibility and Economic factors. I have ranked as the criteria as below: 1) Health Risk 2) Economic 3) Accessibility 4) Natural Area

The Health risk to me will be the most important because the buildings must be at a certain distance away to prevent the spread of disease. The next factor will be Economic because to build a quarantine centre, it should be build on a gentle ground and not steep ground to reduce development cost Following Factor will be Accessibility where I will think it is less important than cost but will be a good to have if it is accessible. The last factor will be natural area. It will be good if we can retain them, but at times if we need to develope the quarantine centre to prevent the disease from spreading, we might need to sacrifise the natural area for greater purpose.