SMT201 AY2019-20T1 EX2 Wang Youjin

From Geospatial Analytics for Urban Planning
Revision as of 14:36, 8 November 2019 by Youjin.wang.2016 (talk | contribs)
Jump to navigation Jump to search

Part 1: Base Map Views

In order to identify a location suitable for building a National Communicable Disease Quarantine Centre given in the task question, we have to first look at the important aspects for consideration in targeted Gombak planning subzone by building the base map views 1) Gombak Road 2) Gombak Building 3) Gombak Natural Features 4) Digital Elevation together with targeted study area - Bukit Gombak:

1.Map with 4 views

Description: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Youjin Gombak Road.png

Youjin Gombak Building.png

Youjin Gombak Natural.PNG

Gombak Target Road


Description


2.Aggregated View
Youjin DigitalElevation.PNG

Description

Digital Elevation Layer



Write-up



1.Roads(only service & tracks) In view of the Accessibility Factor that we need to consider that requires the selected site to be close to local roads to ensure easy transportation of building materials during the construction stage, we are using roads layer as one of the base map. The data has been cleaned up as required to show only categorized service roads using thicker strokes and tracks using thinner strokes. There are 199 service roads and only 2 tracks. From observation,the service roads spread across of the target area and are more concentrated in the north east didtrict.

2. Building In view of the Health Risk factor that we need to consider that requires the selected site to be away from population to prevent the diseases from spreading to the public. By using categorize visualization of the building types, we can see there are 7 types including clinic, construction site, garage, place of worship, public space, residential area, and train station. However, 95%(505) of the building data are not known of its type which make it hard to present a clear understanding of the building type by categorizing it.


3.Natural Features In view of the Natural Conservation factor that we need to consider that requires the selected site should be also be away from natural features, such as forests, parks and water bodies. From the OSM data, we can see there are 1 forest, 4 parks and 3 water bodies in the target area. Since these features are special regions and are reserved - we will use special color scheme to identify them 1)forest is in grey green, 2)parks is in light green 3)water bodies is in light blue.


4. Digital Elevation In view of the Economic factor that we need to consider that requires the selected site should avoid steep slopes to reduce the development costs for cut-and-fill construction techniques. The lowest elevation is 8 meters above sea level, depicted in grey/white.The highest elevation with 145 meters above sea level, depicted in dark black.


Part 2: Factor Layers:Proximity and Slope Map Views

Next, we did a proximity analysis to show the closeness of all features in target area to the identified features of interest. As shown in the screenshot below, the darker parts the maps below depict higher closeness to the features of interest.

Four views showing the proximity map to 1)target roads layer, 2) buildings layer,3) target natural features layer and 4) slope layer that are created in Part 1.

1. View with 4 Proximity maps


description xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


Youjin RasterRoad.PNG

First, we need to convert the road layer in vector mode into raster layer.

Youjin RoadProximity.PNG

Next, we obtain the proximity view of the rasterized road layer


2.Proximity to target building layer

Description


Youjin RasterBuilding.PNG

Rasterized Building Layer



Youjin BuildingProximity.PNG

Proximity to Building



3.Proximity to target natural features layer


Description

Youjin)RasterNatural.PNG

Rasterized Natural Features Map



Youjin NaturalProximity.PNG

Proximity to Natural features



4.Slope Layer


Description

Youjin Slope.PNG

Slope



Part 3: Factor Layers with Criterion Scores

A map layout with four views showing the criterion scores of each factor layers including 1)Economic factor 2) Accessibility Factor 3) Health Risk Factor 4) Natural Conservation Factor

Factor Layer Criterion Scores
1. Economic Factor

he selected site should avoid steep slope. This is because construction at steep slope tends to involve a lot of cut-and-fill and will lend to relatively higher development cost.




School types


Description


2. Accessibility Factor

The selected site should be close to existing local roads, namely: service roads and tracks. This is to ensure easy transportation of building materials during the construction stage

[[File:|600px|center]]

Road Network




3. Health Risk Factor

The selected site should be away from population i.e. housing areas and offices in order to avoid disease spreading to the nearby population

Land Use


4.Natural Conservation Factor

The selected site should be away from forested land, park and water

[[File:|600px|center]]

Road Network



Part 4: Analytical Hierarchical Process (AHP) input matrix

An Analytical Hierarchical Process input matrix and result report and a short description of not more than 150 words discussing the analysis results.

Factor Layer Criterion Scores
input matric

Description


School types


Description

Part 5: Suitability land lot

A map layout with the suitability land lot(s) and a short description of not more than 200 words commenting on each of the suitable land lot identified.


Conclusion Map Layout
Land Lot

Description


School types


Description