The La Mesa City Boundary layer defines the legally recognized limits of the City of La Mesa and serves as a foundational dataset for a wide range of municipal functions—including urban planning, zoning, infrastructure management, and service delivery. This layer is essential for accurately determining city jurisdiction and supports internal operations, business needs, and public understanding of where municipal boundaries apply. It includes attributes such as total area in square miles and acres, enabling precise land-use calculations and geographic analysis. Accessible via the City of La Mesa Open Data Hub, this layer promotes transparency, supports interdepartmental coordination, and encourages community engagement in city planning and development efforts.* Data Refreshed As-Needed

The Annexation History layer documents the historical growth of the City of La Mesa through formal annexations. This dataset serves as a valuable resource for city staff, planners, researchers, and the public, offering insight into how La Mesa’s municipal boundaries have evolved over time. It includes key attributes such as annexation names, unique annexation numbers, dates of approval, and year of completion, providing a clear timeline of territorial changes. These details support historical research, urban development analysis, and long-term planning related to land use, infrastructure, and municipal services. Each annexation area is uniquely identified, allowing for accurate record-keeping and seamless integration with other GIS layers. The dataset is updated as historical records are refined or new annexation data becomes available, ensuring accuracy and continued relevance. By making this information publicly accessible on the City’s open data platform, La Mesa promotes transparency, encourages civic engagement, and helps preserve the city’s development history. This layer also provides important context for understanding present-day jurisdictional boundaries and future planning efforts. * Data Refreshed As-Needed