1. Developing a Town Center In Sierra Vista A Preliminary Suitability Analysis
Gregory J. Christakos
University of Arizona – MSGIST Program
City Of Sierra Vista, Metropolitan Planning Organization

2. Background City of Sierra Vista Development of a Town Center
Largest City In Cochise County
Pop. 43,806 (2014 est.)
sq. mi (2010)
Development of a Town Center
Lack of traditional downtown
Rebranding Effort
Coordinate Info.
GCS NAD83
Projection Transverse Mercator Cochise County
How accessible are amenities

3. Purple Area is MPO Boundary
Purple Area is MPO Boundary. Southern Half is not a part of the city but is included due to possible future annexations, urban area.

4. Geographical Problem
Is the current Fry Boulevard site ideal for town center development?
Mixed Use Zoning
Secondary Sites
Fry Site Chosen By City Council due to park and road access. Different opinions within community of better sites. Can GIS help provide an answer to this problem?

5. Methods Identify Feature Variables Ideal For Mixed Zoning Residential
Libraries, Schools, Post Offices, Colleges
Identify Travel Cost Surfaces
Streets, Transit, Pedestrian
Generate Cost Distance Layers Using Features & Travel Cost Surfaces
Ex) Library Accessibility via Streets?
Reclassify Cost Distance Layers With Fuzzy Membership
0 – 1 Range, Continuous vs. Discrete
Apply Fuzzy Overlay To Fuzzy Membership Layers
Linear Suitability
To evaluate proximity of any location in the city to the targeted features, such as parks, the costs of traveling to these features needed to be calculated.

8. Areas in dark = low cost of accessibility along street network

9. Transforms the input raster into a 0 to 1 scale, indicating the strength of a membership in a set
Linear probability relationship

10. Ran a reclassification on high fuzzy membership areas

11. West

12. Outcomes & Conclusions
As a sample, Fry Boulevard & West End Site are most ideal based on
4 of 20 sample Features Variables
Streets as the only Travel Cost Surface
Complete Analysis = 20 Feature Variables applied to three different Travel Cost Surfaces with one total Fuzzy Overlay
A total of 60 different inputs
Good indicator of overall suitability and accessibility for mixed use town center

13. Sources
Alharbi, Basim S. "Creating a Vibrant Place for the City of Redlands Assessing the Suitability of an Abandoned Downtown Space for Mixed Use Development." Inspire.redlands. University of Redlands, n.d. Web. 16 Sept
"ArcUser Online." Incorporating Expert Knowledge New Fuzzy Logic Tools in ArcGIS 10. N.p., n.d. Web. 17 Sept
"Cost Functions." Resources.esri. Esri, n.d. Web. 20 Sept
"How Fuzzy Membership Works." ArcGIS Resource Center. Esri, n.d. Web Sept
"Overview of Fuzzy Logic Site Selection in GIS ~ GIS Lounge." GIS Lounge. N.p., 14 Apr Web. 17 Sept
"United States Census Bureau." QuickFacts, Sierra Vista, Arizona. U.S. Census Bureau, 3 Sept Web. 16 Sept