What is the central meridian for zone I of the Philippine Plane Coordinate System?

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Multiple Choice

What is the central meridian for zone I of the Philippine Plane Coordinate System?

Explanation:
In this system, each longitudinal zone has a central meridian—the longitude line that acts as the projection’s axis and minimizes distortion within that zone. For zone I, the central meridian is 117° East, putting the zone’s center right on that line. If the zone width is about 6°, zone I would commonly span roughly 114°E to 120°E, with 117°E as the reference line. Other longitudes would correspond to centers of neighboring zones or misalign with zone I’s designated central line, so they aren’t the standard reference for zone I.

In this system, each longitudinal zone has a central meridian—the longitude line that acts as the projection’s axis and minimizes distortion within that zone. For zone I, the central meridian is 117° East, putting the zone’s center right on that line. If the zone width is about 6°, zone I would commonly span roughly 114°E to 120°E, with 117°E as the reference line.

Other longitudes would correspond to centers of neighboring zones or misalign with zone I’s designated central line, so they aren’t the standard reference for zone I.

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