The Montrose Geographic Mapping extension provides comprehensive geographic information system (GIS) capabilities specifically designed for Montrose County’s spatial data portal, offering advanced mapping functionality, spatial data visualization, and location-based services tailored to the diverse geographic landscape and administrative needs of Colorado’s Western Slope region. This specialized extension integrates sophisticated mapping technologies with Montrose County’s unique geographic characteristics, including mountainous terrain, agricultural areas, recreational lands, and urban centers, providing comprehensive spatial data management and visualization capabilities. The system supports multiple geographic data formats including shapefiles, GeoJSON, KML, and raster data with intelligent coordinate system transformation and spatial indexing optimized for Colorado State Plane and UTM coordinate systems commonly used in county operations. Advanced features include interactive mapping interfaces with layer management, spatial query capabilities, and integration with Montrose County’s cadastral and land use databases for comprehensive property and zoning information visualization. The extension provides specialized tools for agricultural land mapping, recreational area management, watershed analysis, and emergency management spatial planning reflecting Montrose County’s diverse land use patterns and administrative responsibilities. Administrative tools include spatial data validation, coordinate transformation utilities, and integration with county GIS workflows for seamless spatial data publishing and maintenance. Integration capabilities extend to external GIS systems including ESRI ArcGIS, QGIS, and Colorado state spatial data infrastructure for comprehensive spatial data sharing and interoperability. The system supports custom mapping applications, spatial analysis tools, and integration with county planning and development processes for comprehensive land use management. Performance optimizations ensure efficient handling of large spatial datasets with tile caching, spatial indexing, and optimized map rendering for responsive user experience. Essential for Montrose County’s spatial data management initiatives, supporting county planning and development processes, enhancing public access to geographic information, and promoting informed decision-making through comprehensive spatial data accessibility in county operations including land use planning, emergency management, agricultural administration, and recreational resource management serving diverse stakeholder needs across Montrose County’s varied geographic landscape.