SMT201 AY2019-20G2 EX2 Lek Jan Yee Lois

GIS Modelling for Urban Land Suitability Study

We are conducting a study to identify a suitable location for building a National Communicable Disease Quarantine Centre located at Gombak planning subzone. The site would need to have a contiguous area of at least 10,000m2 and meet the following criteria:

1) Economic factor: The site should avoid having steep slopes as that would require cutting and filling which would amount to a relatively higher development cost.
2) Accessibility factor: The site should be close to existing roads (service roads and tracks) for easy transportation of building materials
3) Health risk factor: The site should be away from the population as we would want to prevent the disease from spreading.
4) Natural conservation factor: The site should be away from forested land, water and parks.

Part 1: Map View with Study Area, Target Roads, Buildings, Natural Features, Digital Elevation

Layer	Header text
Target Roads	Example
Buildings	Example
Example	Example
Example	Example

The data for this analysis was obtained from the Master Plan 2014 Subzone Boundary, BBBike Singapore (buildings, roads, nature) and ASTER Global Digital Elevation Model (Elevation raster layer).

Part 2: Proximity Analysis

Part 3: Criteria Scores

Layer	Description
Standardised Proximity to Buildings	Example
Example	Example
Example	Example

Part 5: Land Suitability

Using the standardised results from part 3, I merged all four layers together by using the raster calculator. Each factor was multiplied by its respective AHP value to give weightage.

The range of results for the merged layer was from 0.207 to 0.867. To get an understanding of the optimal values, I standardised the results again and selected the region where it was more than equals to 85%.

References

1. Master Plan 2014 Subzone Boundary [[1]]
2. BBBike Singapore [[2]]