SMT201 AY2019-20T1 EX1 Wang Youjin

Part 1: Thematic Mapping

Explain how the mapping were developed with elaboration:

Data	QGIS Techniques
data.gov - “School Directory and Information”	New Layer: Schools created from csv file using Geocoding tool MMQGIS plugin. 'Address' attribute is used for openstreet map projection Distribution of school types: Under Symbology, select categoriszation by `mainlevel_` attribute.Different colors are used to indication different school types for easy illustrative reference purpose [File:Wyj Schoo layer.PNG|250px|center]] FIGURE I ROAD SELECTION LINE AND MAP LINE Data not found CSV from geocoding: - RAFFLES INSTITUTION - BOWEN SECONDARY SCHOOL
“Masterplan 2014 Landuse” dataset retrieved from data.gov.sg.	Layer: Land Use Symbology: Light Grey simple fill FIGURE II SCALE VISIBILITY Visualisation Rule: The visibility of Land Use layer is automatically displayed as the user zooms in approximately 1-2 times.
SLA’s National Map Line retrieved from data.gov.sg. Road Selection Line dataset retrieved from SLA provided by Prof Kam (HandsOnEx1).	Layer: Map Line & Road Network Visualisation Rule: FIGURE III ROAD SELECTION LINE AND MAP LINE Processing: 2 datasets was used to represent different types of road. The national map line only provides expressway, major roads, international boundary and contour lines, the road selection data provides overall road network in Singapore. The Map Line layer highlights its road types using the categorisation rule, applying different colours and line width to emphasize type of road. The minor road can be implied by excluding road network that belongs to express way, intersections, and major roads.
“MP14_SUBZONE_NO_SEA_PL” by URA retrieved from data.gov.sg.	Layer: MP14_SUBZONE_NO_SEA_PL Symbology: Light Brown simple fill Was included to provide a macro view base layer as an optional display. The layer represents subzones that could be useful in interpreting where road networks or school is located. OpenStreetMap view could also be used, however the subzone layer better express the subzone boundaries through a simple display.

FIGURE IV

OVERVIEW OF THEMATIC MAPPING

Firstly, the thematic mapping shown in figure 5 represents the default view of the map. School data points, map line and road network are shown on top of the OpenStreetMap.

FIGURE IV

MICRO VIEW OF LAND USE VISIBILITY WITH ROAD NETWORKS AND SCHOOL DATA POINTS

The land use data was set with automatic scale visibility, the overall land use layer will only be clearly visible as the user zooms in for interpretation. The land use data provides a micro level data of the indicative polygon of each development land parcel. Thus, there’s no need for this layer to be displayed in a more macro view as lines will not be value-adding to visualisation interpretation.

Next, the national map line only provides expressway (blue line), major roads (magenta line), international boundary and contour lines (excluded), while the road selection data provides overall road network in Singapore. Thus, achieving an overview of all types of road can be done by overlapping the road networks to retrieve minor road (red line) through overlapping as shown in figure V.

FIGURE VI

SUBZONE VIEW

FIGURE VII

OPENSTREETMAP VIEW

The `MP14_SUBZONE_NO_SEA_PL` and OpenStreetMap layer (Figure VI & VII) were added as I believe that it might help in terms of data interpretation, eg: finding out where a junior college is located by subzones and its distance to major road where it's usually major road provides better transportation option/accessibility.

Part 2: Choropleth Mapping

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FIGURE VIII

LAYERS EXPORTED

The choropleth mapping developed uses these following data and applied techniques:

Sources and Methods

Dataset	Visualisation & Processing Technique
“Singapore Residents by Planning Area/Subzone, Age Group and Sex, June 2000 - 2018” from Department of Statistics Singapore.	Layer: respopagsex2000to2018_unfiltered Processing: 1. [[File: |center|600px]] FIGURE IX FILTERING AGED POPULATION 2. . [[File:|center|500px]] FIGURE X AGGREGATING DATA USING GROUPSTATS [[File:|center|400px]] FIGURE XI IMPORTING GROUPSTATS GENERATED CSV USING CUSTOM DELIMITER s: a. `is. b. ones. [[File:|center|400px]] FIGURE XII DATA OVERVIEW OF IMPORTED GROUPSTATS DATA [[File:|center|400px]] FIGURE XIII DATA OVERVIEW OF IMPORTED GROUPSTATS DATA 4. Led. 5. We [[File:|center|400px]] FIGURE XIV PROPORTION FIELD CREATION a. [[File:|center|300px]] FIGURE XV DERIVING PERCENTAGE CHANGE 6. L
Singapore Master Plan 2014 Subzone and Planning Area 2014 boundary data retrieved from data.gov	1. `SumAgedPopulation2010_PA` layer joined with `sum_aged_pop_2010_pa` by matching attribute `PLN_AREA_N` and `Zone_ID_PA`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XVI CATEGORISATION OF PLANNING AREA SUM AGED POPULATION DATA 2. `SumAgedPopulation2018_PA` layer joined with `sum_aged_pop_2018_pa` by matching attribute `PLN_AREA_N` and `Zone_ID_PA`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XVII CATEGORISATION OF PLANNING AREA SUM AGED POPULATION DATA 3. `SumAgedPopulation2010_SZ` layer joined with `sum_aged_pop_2010_sz` by matching attribute `SUBZONE_N` and `Zone_ID_SZ`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XVIII CATEGORISATION OF SUBZONE SUM AGED POPULATION DATA 4. `SumAgedPopulation2018_SZ`layer joined with `sum_aged_pop_2018_sz` by matching attribute `SUBZONE_N` and `Zone_ID_SZ`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XIX CATEGORISATION OF SUBZONE SUM AGED POPULATION DATA 5. `ProportionAgedPopulation2010_SZ` layer joined with `propotion_aged_pop_2010` by matching attribute `SUBZONE_N` and `Zone_ID_SZ`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XX CATEGORISATION OF SUBZONE PROPORTION AGED POP DATA 6. `ProportionAgedPopulation2018_SZ` layer joined with `propotion_aged_pop_2018` by matching attribute `SUBZONE_N` and `Zone_ID_SZ`. a. Symbology (Natural Jenks): [[File:|center|400px]] FIGURE XXI CATEGORISATION OF SUBZONE PROPORTION AGED POP DATA 7. `Percentage_Change_SZ` layer joined with `2010_2018_percentage_change` by matching attribute `SUBZONE_N` and `Zone_ID_SZ`. a. Symbology: Below is the configuration used for percentage change of aged population. The legend classification intervals were split into 2 ways, negative changes which represents a decrease change were categorised using an equal distribution from the minimum decrease value of -100% to 0. Next, Natural Breaks (Jenks) were used to classify the 5 next categories for the positive values to indicate. Due to its high variance value, the Jenks classification represents best for this case. Additionally, 2 distinct colours (red and blue) were used to appropriately display the nature of percentage change of the aged population from 2010 to 2018. [[File:|center|500px]] FIGURE XXII CATEGORISATION OF SUBZONE PERCENTAGE CHANGE DATA [[File:|center|500px]] FIGURE XXIII 3 BASE COLOR PICK FOR SUBZONE PERCENTAGE CHANGE DATA [[File:|center|400px]] FIGURE XXIV DATA LABELLING For [[File:|center|200px]] FIGURE XXV CATEGORISATION OF SUBZONE PERCENTAGE CHANGE DATA Enabling each layer’s label can be done via `Layer Properties`.

Data Interpretation

Aged population (+65) in 2010 and 2018

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FIGURE XXVI

OVERVIEW MAP OF TOTAL AGED POPULATION IN 2010 BY PLANNING AREA

The plotted map a

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FIGURE XXVII

OVERVIEW MAP OF TOTAL AGED POPULATION IN 2018 BY PLANNING AREA

As we \ -

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FIGURE XXVIII

OVERVIEW MAP OF TOTAL AGED POPULATION IN 2010 BY SUBZONE WITH LABEL

Figure

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FIGURE XXIX

OVERVIEW MAP OF TOTAL AGED POPULATION IN 2010 BY SUBZONE WITHOUT LABEL

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FIGURE XXX

OVERVIEW MAP OF TOTAL AGED POPULATION IN 2018 BY SUBZONE WITHOUT LABEL THAT SHOWS INCREASE AGED POPULATION

Figure

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FIGURE XXXI

LABELLING FOR TOTAL AGED POPULATION BY PLANNING AREA/SUBZONE

Fie map.

Proportional of aged population in 2010 and 2018

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FIGURE XXXII

OVERVIEW MAP OF THE AGED POPULATION PROPORTION IN 2010 BY SUBZONE

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FIGURE XXXIII

OVERVIEW MAP OF THE AGED POPULATION PROPORTION IN 2018 BY SUBZONE

We

Percentage change of aged population between 2010 and 2018

Percentage Change only include those that has non 0 value in year 2010. Thus if 2018 have value it still doesn’t count as the percentage change is not valid,

 

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FIGURE XXXIV

OVERVIEW MAP OFPERCENTAGE CHANGE BETWEEN 2010 & 2018 BY SUBZONE WITH LABEL

Figu

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FIGURE XXXV

OVERVIEW MAP OFPERCENTAGE CHANGE BETWEEN 2010 & 2018 BY SUBZONE WITHOUT LABEL

Exported Maps from Map Composer

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