This article aims to show how a spatial web server that takes advantage of visualization and spatial analysis applied to geomarketing can generate many benefits for companies and people who use it, helping decision-making, meeting objectives, developing new strategies and markets, and the expansion and growth of new and old businesses, especially supported by Open Source data and software. Keywords: Marketing, Visualization, Web Server Spatial, Open Source. 1. Introducción En la actualidad muchas empresas han