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| | === Gombak and Digital Elevation === | | === Gombak and Digital Elevation === |
| | [[File:Elevation1.png|1600px|thumb|center]] | | [[File:Elevation1.png|1600px|thumb|center]] |
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| − | == Part 2: Decision Factors ==
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| − | === Economic Factor ===
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| − | The 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.
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| − | According to Legal Eagle Contractors, Co. [1], "Less than 10% incline is considered slight and is the easiest to build on, while 11-20% is considered moderate. Anything above 20% is deemed steep.". Hence, I used that as the measure to deem if an area is too steep for building the site.
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| − | Using the following matrix, I used a ranked model to compute a score for the economic factor.
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| − | {| class="wikitable"
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| − | |-
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| − | ! Percentage of Incline
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| − | ! Score
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| − | |-
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| − | | Less than 10%
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| − | | 2
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| − | |-
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| − | | 10-20%
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| − | | 1
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| − | |-
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| − | | More than 20%
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| − | | 0
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| − | |}
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| − | === Accessibility Factor ===
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| − | 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.
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| − | I assume that for the site to be accessible, the site must be at least 200m away from local roads.
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| − | I used a binary model, where I gave a score of 1 for the areas that were within 200m from a local road, and a score of 0 for the areas that were more than 200m away from a local road.
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| − | === Health Risk Factor ===
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| − | The selected site should be away from population i.e. housing areas and offices in order to avoid disease spreading to the nearby population.
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| − | I assume that for the site to be sufficiently far away from buildings, it needs to be minimally 250m away from buildings.
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| − | I used a binary model, where I gave a score of 1 for the areas that were at least 250m away from buildings, and a score of 0 for the areas that within 250m away from a building.
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| − | === Natural Conservation Factor ===
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| − | The selected site should be away from forested land, park and water.
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| − | I assume that for the site to be sufficiently far away from natural conservation sites, the site must be at least 200m away from natural sites.
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| − | I used a binary model, where I gave a score of 1 for the areas that were at least 200m away from natural sites, and a score of 0 for the areas that within 200m away from a natural site.
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| − | === Final Output ===
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| − | I used the Raster Calculator to calculate the final scores to deduce where would be the best area to build the site, with the formula "Economic@1" + "Accessibility@1" + "HealthRisk@1" + "Natural@1", where the variables refer to the factors as listed above respectively.
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| − | [[File:FinalRC1.png|1600px|thumb|center]]
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| − | References:
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| − | [1] https://legaleaglecontractors.com/building-house-on-slope-challenges/
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