Explore the realm of geomatics engineering by elucidating the theory and applications of geographic information systems ( GIS ) in civil engineering projects. Describe the principles of GIS technology, including spatial data acquisition, storage, analysis, and visualization, and discuss its applications in site selection, land use planning, infrastructure management, and environmental assessment. Analyze the integration of GIS with other geospatial technologies, such as remote sensing and global positioning systems ( GPS ) , and evaluate its potential for enhancing decision - making processes and improving the efficiency and effectiveness of civil engineering projects.