The Philippines' National Mapping and Resource Information Authority (Filipino: Pambansang Pangasiwaan sa Pagmamapa at Dulugang Kaalaman), abbreviated as NAMRIA, is an agency of the Philippine government under the Department of Environment and Natural Resources responsible for providing the public with mapmaking services and acting as the central mapping agency, depository, and distribution facility of natural resources data in the form of maps, charts, texts, and statistics.

31, series of 1988, which prescribed the guidelines implementing Section 22 (a) of Executive Order 192, our organization is mandated to provide the public with mapmaking services and to act as the central mapping agency, depository, and distribution facility of natural resources data in the form of maps, charts, texts, and statistics.

The functions of the Hydrography Branch (HB) are: As the sole agency of the government, NAMRIA with its Mapping and Geodesy Department (MGD) produces, maintains and updates base maps that will serve as basic inputs in various development activities of the government, the academic and scientific community, and the private sector.

Its functions are: The Geospatial Information System Management Branch (GISMB) works toward the sharing, transfer, exchange, packaging and dissemination of environment and natural resources data.

The Engineering Services Department (ESD) is mandated to work and maintain the internet connection, maintenance of the agency data link server and all of the office computers, facilities and vehicle, instrument.