Which term refers to the Philippine Reference System of 1992, a national common coordinate reference system for all surveys and maps pursuant to Executive Order No. 45 dated January 5, 1993, as amended?

• A. PRS91
• B. Philippine Spatial Reference
• C. National Coordinate System 1993
• D. PRS92

Answer: (D)

PRS92, the Philippine Reference System of 1992, is the national common coordinate reference system for all surveys and maps in the Philippines. It was established under Executive Order No. 45 dated January 5, 1993 (as amended) to provide one standardized geodetic framework so coordinates from any survey or map align on the same datum and projection across the country. This standardization enables consistent positioning for government and private mapping, GPS, and geographic data sharing, replacing earlier local datums and ensuring uniformity nationwide. The other terms don’t reflect the official designation: PRS91 would imply a different year, the term Philippine Spatial Reference isn’t the formal name, and National Coordinate System 1993 isn’t the recognized designation used in the EO.