The Philippine Transverse Mercator (PTM) coordinates are transformed from geographic to grid coordinates on which combined system?

The Philippine Transverse Mercator (PTM) coordinates are transformed from geographic to grid coordinates on which combined system?

• A. PPCS/PRS92
• B. PPCS/Luzon 1911
• C. Local Plane Coordinate System
• D. Philippine Plane Coordinate System

Answer: (B)

PTM uses a specific combined system that defines both the grid framework and the underlying geodetic datum. The Philippine Transverse Mercator projection maps geographic coordinates onto the Philippine Plane Coordinate System (PPCS) using the Luzon 1911 datum. This PPCS/Luzon 1911 pairing provides the reference ellipsoid and origin that the grid coordinates are built on, while the PPCS defines the grid layout itself. Other options mix different datums or are too vague to describe the exact framework PTM relies on. For PTM, the combination that matches the standard practice is PPCS/Luzon 1911.

PTM uses a specific combined system that defines both the grid framework and the underlying geodetic datum. The Philippine Transverse Mercator projection maps geographic coordinates onto the Philippine Plane Coordinate System (PPCS) using the Luzon 1911 datum. This PPCS/Luzon 1911 pairing provides the reference ellipsoid and origin that the grid coordinates are built on, while the PPCS defines the grid layout itself.

Other options mix different datums or are too vague to describe the exact framework PTM relies on. For PTM, the combination that matches the standard practice is PPCS/Luzon 1911.