Which organization maintains the geodetic control network of the Philippines?

The correct choice is the National Mapping and Resource Information Authority (NAMRIA). This organization is responsible for maintaining the geodetic control network of the Philippines, which includes the establishment, consolidation, and preservation of geodetic reference points throughout the country. NAMRIA plays a crucial role in supporting various sectors like land management, engineering, surveying, and environmental programs by providing essential mapping and spatial data.

Geodetic control is foundational for accurate positioning and mapping, making the authority's function vital for both public services and private enterprises that rely on precise geographic information. By establishing and maintaining this network, NAMRIA ensures that the geodetic framework is consistent and can support various applications such as land surveying, navigation, and disaster management.

The other organizations listed, while involved in land and resource management in the Philippines, do not specifically have the mandate to maintain the geodetic control network as NAMRIA does. This instrumental role in ensuring accurate and reliable geospatial data separates NAMRIA in this context.