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Scottsdale Grids
We found that Scottsdale is organized into various configurations of grids. This can be seen in the images below. (click the arrows to see the various configurations and their original layouts).
The presence of a standardized grid pattern allows us to make more precise estimations for the contents of the average grid. This will become useful when we determine the average number of houses in a grid.
Grid Size
Using the City of Scottsdale's "My Neighborhood" app in conjunction with the measurement tools they provided, we were able to determine that the standard grid size was 0.25 square miles.
The resource mentioned above can be found here.
Fig. 15: Screenshot of Grid measurement
Fig. 16: Screenshot of Scottsdale Area measurement
Scottsdale's Square Mileage
Using the same tool that was mentioned above, we manually traced out the border of Scottsdale. We found that the total area of Scottsdale is approximately 184.7 square miles.
To verify this information we researched U.S. Census data. The recorded value for the total area of Scottsdale was found to be 184.44 square miles.
This information can be found here.
Scottsdale's Land Usage Map
Using a zoning map of the Scottsdale city limits, we were able to identify rough percentages for the overall contents of the city. The primary components that we are concerned about for this project are the yellow, beige, brown, and pink areas. These areas are considered Rural, Suburban, Urban, and mixed-use neighborhoods respectively.
The estimated concentrations that our group came up with are as follows:
Rural (Yellow): 33%
Suburban (Beige): 25%
Urban (Brown): 5%
Mixed-Use (Pink): 12%
Everything else: 25%
Fig. 17: Image of zoning map (provided by City of Scottsdale's Website)
Average Number of Housing Units per Grid
Using screenshots of sample grids we were able to find the average number of housing units for that type of grid. To do this, we selected 3 grids of each type with varying degrees of density. This would allow us to account for high density areas as well as low density areas. Taking the average should give us a nice middle ground to work with in our calculations.
Rural
Fig. 18: Rural sample grid 1
Fig. 19: Rural sample grid 2
Fig. 20: Rural sample grid 3
Rural neighborhoods are defined as being further from the city center and containing both houses and large land plots. For this type, we selected 3 rural grids with varying layouts and densities. Our calculation is below.
Average number of houses per grid = (Sample 1 + Sample 2 + Sample 3) / 3
(46 houses + 33 houses + 40 houses) / 3 = 39.6667 or 40 houses for every 1 rural grid
Suburban
Fig. 21: Suburban sample grid 1
Fig. 22: Suburban sample grid 2
Fig. 23: Suburban sample grid 3
Suburban neighborhoods are defined as neighborhoods that are just outside of the city center and typically have more land allocation per house.
Average number of houses per grid = (Sample 1 + Sample 2 + Sample 3) / 3
(608 houses + 245 houses + 209 houses) / 3 = 354 houses
Urban
Fig. 24: Urban sample grid 1
Fig. 25: Urban sample grid 2
Fig. 26: Urban sample grid 3
Urban neighborhoods are defined as densely packed neighborhoods consisting of apartments, Condominiums, and Townhouses. While looking for areas to sample, we found that these urban neighborhoods rarely fill an entire quarter square mile grid. Therefore we were required to take our averages over a quarter grid space. To account for this change, we will multiply our values by 4 to meet the bounds of a quarter square mile grid.
In sample grid 1, we counted a total of 63 buildings, where the buildings have anywhere from 2 to 3 units each. This should give us a total of approximately 158 housing units. We then multiply this number by 4 to get the total number of units for a standard-size grid. Multiplying by 4 gives us a total of 632 units. (This is a very generous approximation.)
In sample grid 2, we counted a total of 53 buildings, where the buildings have anywhere from 1 to 16 units each. This should give us a total of approximately 451 units. We then multiply this number by 4 to get the total number of units for a standard-size grid. Multiplying by 4 gives us a total of 1804 units. (This estimate is by no means accurate due to the inability to measure the number of stories, the size e of each unit, or the number of units in each building.)
in sample grid 3., we counted a total of 76 buildings, where the buildings have anywhere from 1 to 16 units each. This should give us a total of approximately 646 units. We then multiply this number by 4 to get the total number of units for a standard-size grid. Multiplying by 4 gives us a total of 2,584 units. (This estimate is also unlikely to be accurate because there is no way to determine how many stories the buildings are or how many units are in each building.)
Despite the potential inaccuracies, we estimate the total number of units per urban grid is approximately 1,673 Units per grid. This value was found using the equation below:
Average number of houses per grid = (Sample 1 + Sample 2 + Sample 3) / 3
(632 units + 1804 units + 2,584 units) / 3 = 1,673.333 or 1,673 units
Due to the inconsistencies in the building sizes, complex arrangements, and the inability to accurately measure the number of units per building, We will complete our calculations in two different methods. The first method will be including the urban housing units and the second method will not include the urban housing units. Since there is no discernable method to counting the number of units per grid, we cannot provide an accurate estimation for this type of neighborhood.
Mixed-Use
Fig. 27: Mixed-use sample grid 1
Fig. 28: Mixed-use sample grid 2
Fig. 29: Mixed-use sample grid 3
Mixed-use neighborhoods are defined as neighborhoods that are close to the city center and contain both housing units and businesses to allow citizens quick and easy access to necessities and entertainment.
Average number of houses per grid = (Sample 1 + Sample 2 + Sample 3) / 3
(364 houses + 493 houses + 254 houses) / 3 = 370.333 or 370 houses
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