SMT201 AY2019-20T1 EX1 Wang Youjin

Part 1: Thematic Mapping

Explain how the mapping were developed with elaboration:

Data	QGIS Techniques
1.data.gov - “School Directory and Information”	New Layer created: 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 School types Data not found CSV from geocoding: - RAFFLES INSTITUTION - BOWEN SECONDARY SCHOOL
2.data.gov - “Masterplan 2014 Landuse” "National Map Line" SLA - "Road Selection Line"	Layer Imported: Land Use, Road Selection Line, National Map Line Different color lines and width are used to represent different types of road with cateogirized technique performed on the map line layer use Road Network
3. data.gov - “MP14_SUBZONE_NO_SEA_PL”	Layer: MP14_SUBZONE_NO_SEA_PL

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FIGURE IV

OVERVIEW OF THEMATIC MAPPING

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`.