The objective of this project is to design and implement an interactive web viewer with a spatial component for visualizing mobility and infrastructure data in the municipality of Santa Coloma de Gramenet (Barcelona). These data have been obtained from the information provided by the local administration of Santa Coloma de Gramenet and are presented in the form of maps and geographic layers. The cartographic viewer has been developed using the ArcGIS Online platform by (ESRI), which has allowed creating an interactive web viewer easily and quickly. With the resulting viewer, users can make queries or apply filters to obtain informative data, such as the distribution and geographical evolution of green spaces in the municipality, the location of various municipal services, and transportation networks within the municipal area. The cartographic viewer is intended for the general public and can be accessed freely through the web. In addition to enhancing mobility in the municipality of Santa Coloma de Gramenet, the viewer also provides valuable and relevant information for its residents, thereby improving their quality of life.