Worked on updating the Tallinn CTR lateral boundary data within the lennycolton/vatglasses-data repository, focusing on enhancing mapping and navigation accuracy for the Tallinn City Traffic Region. The project involved refining the ee.json file by integrating new geographic data points, leveraging skills in data management and geospatial analysis. Emphasis was placed on thorough data validation and integrity checks to ensure compatibility with downstream systems and prevent regressions. The update process included preparing release artifacts and comprehensive documentation, supporting a smooth deployment. The work was conducted primarily using JSON, with a focus on delivering tangible improvements in routing accuracy and user experience.