Metadata GeoPortal: Advancing Map Data Management and Collaboration Across Sectors

Abstract. In Turkiye, a diverse range of organizations, including public institutions and private sector entities, are actively engaged in the production and management of geospatial information. To enhance coordination, minimize duplication of efforts, and optimize resource use, the Metadata GeoPortal (Map Information Bank) was developed. This web-based platform acts as a central hub for both public and private users to enter, update, and share metadata connected to their mapping activities. It offers quick access to essential map data, supports decision-making processes, and underpins various e-government initiatives. Operating in accordance with the Large-Scale Map and Map Information Production Regulation, the Metadata GeoPortal aims to prevent redundant map production and ensure efficient utilization of national resources. Designed to comply with the ISO 19115 Metadata Standard, the platform allows users to register mapping projects, assign unique project numbers, and generate endpoint numbers (SNN) for coordinate data. The GeoPortal improves data sharing and coordination across different sectors. For instance, data entered by entities such as the General Directorate of Land Registry and Cadastre (TKGM) and the General Directorate of Mapping (HGM) can be shared with other stakeholders through web services following established protocols. This facilitates seamless access to critical geospatial data, including control points, aerial photographs, orthophotos, elevation models, and topographic maps. Since its launch in July 2008, the Metadata GeoPortal has undergone continuous improvements. It is now widely used by ministries, public institutions, municipalities, and private entities, extending its impact in mapping, cadastral work, and geographic information systems. The February 2022 update introduced a new user interface, allowing TKGM units to download map data directly without formal correspondence. Additional features, such as direct access through the Parcel Inquiry System, have further increased the platform’s usability. Looking ahead, the upcoming “Phase 4” updates will expand the platform’s functionalities, enhancing geospatial data management and collaboration across sectors. The Metadata GeoPortal is a pivotal tool in Turkiye’s efforts to modernize and centralize geospatial data management, reduce redundancy, and maximize resource efficiency.