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Spatial Analysis

I will be using two types of MCE to find the most suitable area. The first one is using the overlay module with Boolean images and the second one is using the Weighted Linear Combination (Fuzzy module).

MCE: Boolean Operations

The first step in analyzing the problem is to come up with a set of criteria for all the different factors. The criteria which I have used to determine the most suitable area are listed below:

  1. The site must be 50m away from the bike routes and within 1000m from the bike routes.
  2. The site must be 100m away from any skytrain stations and within 1000m from skytrain stations.
  3. The site must be 50m away from any bus stops and within 500m from the bus stops.
  4. The site must be located within areas that contain population density between 1000-4000 persons/km2
  5. The site must be 50m away from any parks and within 1500m from a park.
  6. The site must be 50m away from any commercial areas and within 3000m from a commercial zone.
  7. The site must be 200m away from an institution and within 10000m from an institution.
  8. The site must 1000m away from any industrial area.

Click here to view the macro modelers.

Boolean images with buffer zones

50m away from the bike routes and within 1000m from the bike routes

100m away from any skytrain stations and within 1000m from skytrain stations

50m away from any bus stops and within 500m from the bus stops

located within areas that contain population density between 1000-4000 persons/km2

50m away from any parks and within 1500m from a park

50m away from any commercial areas and within 3000m from a commercial zone

200m away from an institution and within 10000m from an institution 1000m away from any industrial area

The final result must meet all these criteria in order to be considered as the most suitable place to live in Vancouver.


MCE: Weighted Linear Combination (WLC)

The first step in analyzing the problem with the WLC is to calculate the distance from each pixel to each of the 8 criteria for evaluation. To do this, the DISTANCE module needs to be run on each layer. Here is a sample of the results:



The advantages of the WLC method is the ability to give different relative weights to each of the 9 factors in the aggregation process. Factor weights, sometimes called tradeoff weights, are assigned to each factor. They indicate a factor's importance relative to all other factors and they control how factors will trade off or compensate for each other.In the case of WLC, where factors fully trade off, factors with high suitability in a given location can compensate for other foctors with low suitability in the same location.

After this is done, simply go through the Decision Wizard in GIS Analysis to create the objective of finding the most suitable place based on the 9 factors.

The objective of this model is to find the most suitable place to live in Vancouver.

Constraints
0
Factors
9
residis, parkdis, commdis, institdis, indusdis, bikedis, stationdis, stopdis, popdis
The eigenvector of weights is : resifuzz 0.1427
parkfuzz 0.1792
commfuzz 0.1197
institfuzz 0.0327
indusfuzz 0.0154
bikefuzz 0.1826
stationfuzz 0.1138
stopfuzz 0.1164
popfuzz 0.0974
Consistency ratio = 0.06
Consistency is acceptable.

From weights are weighted heavier on all the outdoor factors, such as parkfuzz, commfuzz, bikefuzz, stopfuzz, and stationfuzz. These weights are more in favorite of some one who loves outdoor activities, such as shopping, biking, and relies on public transit.

Here are the fuzzy images for the 9 factors.






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