Site Suitability and Whitespace Analysis: How GIS Determines the Best F&B Expansion Points in Yogyakarta’s Education Hub 

Site Suitability and Whitespace Analysis: How GIS Determines the Best F&B Expansion Points in Yogyakarta's Education Hub 

Indonesia’s affordable drinks and dessert segment is going through its most aggressive growth phase in over a decade. New outlets open almost every month, most of them targeting students with products priced under Rp10,000. But behind this fast-paced expansion lies a question many business owners rarely stop to ask: is a new location chosen based on data, or simply because a competitor already looks busy there?  That question sits at the center of an academic study analyzing the expansion strategy of a low-cost F&B chain in Sleman Regency and the City of Yogyakarta, two areas with the highest concentration of educational institutions in Indonesia. Using a Geographic Information System (GIS) approach, the study shows how combining Site Suitability Analysis and Whitespace Analysis can turn location decisions from gut feeling into something measurable and defensible with data. 

Why Yogyakarta’s Education Corridor Is Such a Promising Market 

Sleman and the City of Yogyakarta are home to more than 100 universities and hundreds of secondary schools. The student population in this region is large and stays fairly consistent throughout the academic year, making it a highly relevant market for F&B brands built around affordable pricing. Store clusters for this kind of product tend to follow a predictable pattern: they gather around campuses, student boarding areas, and commercial corridors with high foot traffic (Widaningrum et al., 2020).  This is exactly why proximity to education centers becomes the primary variable in determining site feasibility. Still, this large opportunity also carries real risk when expansion decisions skip a systematic spatial analysis.  Figure 1: Catchment analysis around an education point of interest (STAI Masjid Syuhada, Yogyakarta) in LOKASI Intelligence, showing the age 15-24 population feeding the site suitability score. 

The Problem With Expanding Without Spatial Data 

Intuition-driven expansion has a few weaknesses that usually only surface after a store opens and underperforms. The most common risks include: 
  • Cannibalization between outlets when locations sit too close to each other. 
  • Choosing sites that look promising on the surface but are actually weak in demographics or purchasing power. 
  • Missing whitespace near campuses, meaning high-potential areas that no brand has entered yet. 
Retail location decisions that are not backed by systematic spatial analysis tend to underperform because they skip over a critical variable: geographic demand (Roig-Tierno et al., 2013). 

What Site Suitability Analysis and Whitespace Analysis Actually Are 

These two methods are combined in layers to produce an analysis that is both comprehensive and immediately actionable.  Site Suitability Analysis evaluates the feasibility of each area based on a weighted score built from several variables, such as proximity to campuses or schools, density of the young population, traffic, and socioeconomic status. This produces an objective, scalable score across the entire study area at once.  Whitespace Analysis identifies the gap between high-potential areas and the coverage already claimed by existing outlets and competitors. This is the method that surfaces hidden expansion opportunities nobody has entered yet.  Here is how this GIS-based approach compares to conventional site selection.    Table 1. Comparison of conventional site selection and a GIS-based approach. 
Factor  Conventional Limitation  GIS-Based Solution 
Location selection method  Location selection based on intuition and manual surveys  Standardized multivariable scoring built on spatial data 
Whitespace detection    No systematic way to detect whitespace  POI overlay of competitors combined with demand vs. supply gap analysis 
Site comparison at scale    Hard to compare hundreds of candidate sites at once  Automated grid analysis across the entire area in a single process 
Cannibalization risk    Cannibalization risk between outlets goes undetected  Catchment analysis and buffer radius around existing stores 
Business feasibility    Business feasibility is not measured without rental data  Property price data integrated directly into the scoring model 
 

The Methodology: Hexagonal Grid and Catchment Radius 

One of the more interesting parts of this study is its use of an H3-8 hexagonal grid, roughly 0.73 square kilometers per cell, as the analysis unit for the entire study area. A spatial grid approach like this overcomes the bias that comes from using administrative boundaries, which rarely reflect real consumer mobility patterns, making the resulting analysis far more accurate than simply grouping data by district or sub-district (Widyastuti et al., 2021).  The catchment radius also differs depending on the type of store. Existing outlets are measured with a 500-meter radius, while competitors are measured at 300 meters. That 300-meter figure is not arbitrary. It is based on the average three-to-four-minute walking distance that represents how far a student consumer is realistically willing to travel for an affordable drink near campus (Widyastuti et al., 2021).  The analysis runs through three sequential stages: collecting and integrating every spatial data layer, running Site Suitability Analysis to produce a suitability score map, and finally running Whitespace Analysis, which overlays that score against the catchment of existing outlets and competitors to produce a whitespace zone map and a ranked priority list. 

The Variables and Weights Behind the Scoring 

Site feasibility is calculated from six weighted variables, built around the consumption patterns of the 15 to 24 age group. National expenditure data shows that 68 percent of spending on this kind of drink happens within a 500-meter radius of the nearest educational institution, which is the strongest justification for weighting campus proximity so heavily.  Table 2. Site suitability scoring variables and weights. 
Variable  Weight  Rationale 
Proximity to campuses and schools  30%  Students are the core customer base 
Population density aged 15-24  20%  Direct representation of target market size 
Traffic and road accessibility  20%  Directly affects walk-in traffic 
Property rental price (inverse)  15%  Ensures financial viability 
Area socioeconomic status  10%  Ensures minimum purchasing power is met 
Density of supporting POIs (boarding houses, small shops, minimarkets)  5%  Indicator of commercial activity and student housing density 
  Notably, these weights are not treated as final numbers. Before the model runs at full scale, the weights are validated through a correlation analysis between the spatial score and actual sales data from existing outlets in the study area, so the scoring stays grounded in real business performance rather than pure theory. 

Where the Data Comes From, and How Location Intelligence Makes It Usable 

The scoring model draws on a wide range of spatial layers: education POIs, demographic and socioeconomic data, competitor and existing outlet locations, road networks, administrative boundaries, and property rental prices. Pulling individual layers like these from open sources such as OpenStreetMap, national statistics agencies, and geospatial government bodies is possible on a one-off basis, but stitching them into a single clean, analysis-ready dataset, and keeping that dataset current, is where most teams lose the most time.  This is exactly the gap a location intelligence platform such as LOKASI Intelligence is built to close. Instead of manually collecting and cleaning each layer, it brings POI, demographic, socioeconomic, and mobility data together in one place, so a team can lay a demographic profile directly on top of education POI density, or check competitor coverage against real population movement, without stitching together spreadsheets from a dozen separate sources. For a study like this one, that means the demographic and POI education layer behind the scoring model can be pulled, validated, and refreshed on an ongoing basis rather than rebuilt from scratch every time the model needs updating.  Integrating rental price data is also an important differentiator here, since most location analyses stop at demand potential without checking whether a site is actually financially viable to rent and operate. 

What the Analysis Produces 

The final output of this analysis is built to be used directly by an expansion team, not just filed away as an academic report. The three main deliverables are: 
  • Ranked List, a prioritized list of grid cells and neighborhoods ranked from highest to lowest suitability score, complete with GPS coordinates and the spatial reasoning behind each score. 
  • Map Series, three thematic maps covering the distribution of education centers, whitespace zones not yet covered by competitors, and a final map of recommended expansion points. 
  • Recommendation Report, a narrative summary for each priority location explaining its feasibility based on demographic profile and surrounding competitive conditions. 
  Figure 2: Site Suitability Score map for Sleman and the City of Yogyakarta generated in LOKASI Intelligence, combining education density, age 15-24 demographics, daily mobility, commercial and retail density, and socioeconomic status.    Figure 3: Analysis summary showing the score distribution and the top 10 highest-scoring grid cells across Sleman and the City of Yogyakarta. 

Who Benefits From This Kind of Approach 

A data-driven spatial approach like this creates value at multiple levels for everyone involved in the expansion process. Head office management gets an objective, measurable basis for decision-making, which reduces the risk of suboptimal site selection and cannibalization between stores from the planning stage onward. Prospective franchise partners get location guidance backed by spatial scoring and real rental price data, instead of relying on gut feeling or simply copying a competitor’s location. Meanwhile, the field expansion team gets a ranked list that is immediately actionable, allowing survey time and budget to be spent far more efficiently.  This framework is also designed to be replicable in other Indonesian cities using the same parameters and pipeline, making it a model that scales alongside a broader expansion roadmap rather than one built for a single location study. 

Conclusion 

Sleman and the City of Yogyakarta hold significant F&B expansion potential thanks to the highest concentration of educational institutions in Indonesia and a consistently large student population. That said, most of the prime campus zones are already nearing saturation, while meaningful whitespace is actually scattered across secondary education corridors that the industry has largely overlooked.  The combination of Site Suitability Analysis, Whitespace Analysis, and H3 hexagonal grid analysis shows that a GIS-based spatial approach can answer the retail F&B expansion problem far more objectively, measurably, and repeatably than conventional methods. For F&B operators considering expansion in dense education hubs, this kind of approach deserves to become the new standard for location decision-making. 

A Shoutout to the Author of This Study 

This article draws on a GIS Consulting Project paper titled “Applying Site Suitability and Whitespace Analysis to Determine Competitive Expansion Points Based on Proximity to Education Centers in Sleman and the City of Yogyakarta,” written by Hilman Thoriq, a student in the Applied Bachelor’s Program in Geographic Information Systems, Department of Earth Technology, Vocational College, Universitas Gadjah Mada, with practitioner guidance from Bvarta. Thank you for putting together such a detailed and practical study. May it keep inspiring data-driven decision-making in Indonesian business. 

See Your Own Whitespace Map With LOKASI Intelligence  

The methodology in this study, campus proximity scoring, demographic layering, and competitor whitespace detection, is exactly the kind of analysis Bvarta’s LOKASI Intelligence platform is built to run, refreshed continuously and mapped down to the POI level. If your team is planning an F&B or retail expansion into a dense market like Yogyakarta’s education corridor, Bvarta can help turn this same framework into a live, actionable dashboard.   Reach out via WhatsApp at 0877 7907 7750 or through bvarta.com for a free consultation. 

FAQ 

What is Site Suitability Analysis in the context of F&B expansion? 

Site Suitability Analysis is a GIS method that evaluates how feasible a location is based on a weighted score built from several key variables, such as proximity to demand sources, target population density, accessibility, and rental price. The result is a score map that makes it easy to compare hundreds of candidate sites at once. 

How is Whitespace Analysis different from Site Suitability Analysis?  

Site Suitability Analysis evaluates how good a location is in general, while Whitespace Analysis specifically looks for the gap between high-potential areas and areas not yet covered by existing outlets or competitors. Combining both produces recommendations that are both promising and relatively uncontested. 

Why use a hexagonal H3 grid instead of administrative boundaries like districts?  

A hexagonal grid provides a uniform analysis unit across the entire study area, removing the bias created by administrative boundaries, which often fail to reflect real consumer movement patterns across regions. 

Can this approach only be used for affordable drink brands?  

No. The Site Suitability and Whitespace Analysis framework can be adapted for many other retail and F&B categories with proximity-driven customer behavior, such as minimarkets, pharmacies, education services, or fast food outlets.   

References 

Kotler, P., and Keller, K. L. (2016). Marketing Management (15th ed.). Pearson Education.  Roig-Tierno, N., Baviera-Puig, A., Buitrago-Vera, J., and Mas-Verdu, F. (2013). The retail site location decision process using GIS and the analytical hierarchy process. Applied Geography, 40, 191-198. https://doi.org/10.1016/j.apgeog.2013.03.005  Widaningrum, D. L., Surjandari, I., and Sudiana, D. (2020). Discovering spatial patterns of fast-food restaurants in Jakarta, Indonesia. Journal of Industrial and Production Engineering, 37(8), 403-421. https://doi.org/10.1080/21681015.2020.1823495     
Related Posts