Royal Bank of Canada is interested in examining the application of GIS technology to finding the most suitable retail chains for locating their automatic teller machines (ATM) in Greater Vancouver. This project proposes areas where ATMs could be located and which retailer comes together with the best location and the best performance of ATMs. The RBC benchmark states that there are approximately X number of RBC clients per ATM. Therefore, creating RBC ATM network buffer coverage is required to find out an existing ATM coverage. Generally, the ATM buffer radius is much smaller in an urban area comparing to a rural area. An assumption was made that each ATM only serves the clients inside the buffer area. Another assumption was made that clients were evenly spread across the Dissemination Area. Business categories and business names that are located in ATM buffers with a high number of transactions have been identified. The Huff Model was then used to determine which parts of the study area are underserved. The total number of transactions of each RBC ATM was considered as the attractiveness attribute. One more assumption was made that underserved area has a probability of 0 to 10% that the customer would use any of RBC ATMs. Top ten retail chains in an underserved area have been identified and then buffered to encompass X number of clients. The optimal location for a new ATM would be the business buffers that are not overlapping existing ATM buffers. Market penetration within business buffers was calculated and then classified into low, medium and high. The ideal location for new ATM would be a business buffer within underserved areas with a high market penetration.