Which agency is primarily responsible for land mapping and resource information in the Philippines?

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NAMRIA, the National Mapping and Resource Information Authority, is the government’s primary agency for land mapping and resource information. It oversees official maps, topographic and cadastral surveys, geospatial data, and related resources, supporting planning, land administration, and environmental management with authoritative geographic information. The other agencies focus on different areas: the Mines and Geosciences Bureau handles minerals and geoscience data, the Department of Environment and Natural Resources oversees environmental matters but is not the mapping authority, and the Housing and Land Use Regulatory Board deals with land use and housing regulations. Thus NAMRIA is the correct choice because it is the official source for land mapping and resource information.