What is PRS92?

PRS92 or the Philippine Reference System of 1992 is a homogeneous national network of geodetic control points (GCPs), marked by survey monuments or mojons, that has been established using Global Positioning System (GPS) technology. GPS is an all-weather, high precision, global satellite positioning system that revolutionized navigation and surveying operations.

By virtue of EO 45, PRS92 became the standard reference system for all surveying and mapping activities in the Philippines. The order also mandated that all new surveys and maps shall be referred to the new network and all old surveys shall be integrated into it.

  Significance of PRS92

PRS92 serves as the country's standard coordinate reference system for all survey and mapping activities. It provides the means through which base and thematic datasets can be consistently inter-related geographically.

PRS92 is the fundamental component of the National Spatial Data Infrastructure (NSDI).

  Who are the stakeholders and beneficiaries of PRS92?

The primary stakeholders of PRS92 are all government agencies engaged in surveying and mapping like the DENR, the Department of Agriculture, the Department of National Defense, the Department of Public Works and Highways, the Department of Transportation and Communications, the Department of Agrarian Reform, the National Commission on Indigenous Peoples, and other agencies having interest in mapping.

Private surveyors, foresters, and academic institutions are also major users. Private and public landowners and fisherfolks are the major beneficiaries while the general public that is benefiting from the programs of the mentioned government agencies is the indirect beneficiary.

  What are the legal basis for the implementation of PRS92?

PRS92 was first implemented through EO 45 under the Ramos Administration. Subsequently, it was amended by EO 280 extending its full implementation by 2005. In order to complete the adoption and integration of old surveys into the system until year 2010, EO 321 was issued by President Gloria Macapagal-Arroyo.

  Who are tasked to implement EO 321?

The DENR, through the PRS92 Program Steering Committee, oversees the overall implementation of EO 321, allocates the necessary funds, and issues implementing guidelines. The NAMRIA, Lands Management Bureau and the DENR Regional Operations Committees are the primary agencies responsible in executing the Order.

  How is PRS92 implemented?

The NAMRIA establishes and maintains the primary (first and second-order) control points, which are then densified by the DENR Regional Composite Survey Teams by establishing third, fourth and other lower-order control points. Using a transformation formula, these and previously established control points are integrated into the PRS92 network. All existing surveys and maps of the DENR are also being integrated into the system. The ultimate objective of the program is for all surveys and maps in the country to be compliant with the PRS92 standards.

DENR Administrative Order No. 2005-13 provides the overall guidelines in the implementation of the PRS92 program.

  What are the future plans of the PRS92 program?

To provide better user access to geodetic network information, the DENR plans to upgrade the current geodetic control database into a web-based Geodetic Network Information System (GNIS) that will have both central and regional operations. The establishment of continuously operating reference stations, generally known as Active Geodetic Stations (AGS), is also being envisioned to expedite the densification work and provide real-time positioning services to user communities. Research and development activities shall continue to gather inputs towards the establishment of an accurate Philippine geoid model and/or transition to a geocentric datum.


A “mojon” is a mark on land made of concrete wherein the latitude and longitude coordinates called GCPs or geodetic control points are written for land surveys use. The PRS92 or Philippine Reference System of 1992 is a homogeneous national network of these geodetic control points (GCPs).

The Adopt-a-Mojon program of DENR or Department of Environment and Natural Resources encourages local government units, private sectors and local residents to participate in the establishment and care of these “mojons”.

Download brochure and poster of Adopt-a-Mojon program.