: A lot of research has been developed for integrating the analysis functionality that is available in both analytic and geographic processing systems. The main goal is to provide users with a system capable of processing both geographic idimensional data by abstracting the complexity of separately querying and analyzing these data in a decision making process. However, this integration may not be fully achieved yet or may be built by using proprietary technologies. This paper presents a service integration model for supporting analytic and/or geographic requests over the Web. This model has been implemented by a Web Service, named GMLA WS, which is strongly based on standardized technologies such as Web Services, Java and XML. The GMLA WS query results are displayed in a Web browser as maps and/or tables for helping users in their decision making. Key words: GMLA Web Service, GIS and OLAP Integration, Services Integration Model, ISAG, GMLA Request Schema.