Luzon Datum of 1911 Rock Marker (Geodetic Center of The Philippines) (Hinanggayon)

Philippines / Southern Tagalog / Balanacan / Hinanggayon
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Sometime in 1906 the USCGS (now NOAA) established a geodetic marker drilled in a cubic meter of diorite rock atop this mountain.

Formerly belonging to Balanacan, Mogpog but now is located at the boundaries of Brgy. Argao, Hinanggayon and Silangan, Mogpog, Marinduque, with another reference rock marker about 10 feet away. This important geodetic point marker is used as point number one for all map-makers reference point of the country.

Besides the Luzon Datum of 1911 rock marker, the Philippine NAMRIA establized a concrete reference marker. This Luzon Datum of 1911 is at first level accuracy.

Correct Median Coordinates Point (Center Point of the Philippines):
Located in-between Bulalacao, Oriental Mindoro and Caluya, Antique is the Philippines center point.

Reference Points:
Latitude: 12 deg 15' 37" N
Longitude: 121 deg. 26' 29" E

References:
Northern most point, Yami Island: 21 deg. 6' 44" N
Southern most point, Saluag Island: 4 deg. 35' 31" N

Eastern most point, Languyan Point (Davao Oriental): 126 deg. 35' 44" E
Western most point, Agutaya Point (Balabac Island): 116 deg. 56' 7" E

Please note: This median reference point excludes the Kalayaan group 'Spratly Islands' and Benham Rise from Philippine Sea to the Pacific Ocean.
Nearby cities:
Coordinates:   13°33'36"N   121°52'8"E

Comments

  • Luzon Datum of 1911 rock marker: filed by Joven M. Lilles
  • Correct Datum: The correct datum falls exactly at Romblon Island, Romblon, Philippines and not in Marinduque as previously tought. Median Points: Latitude: 12 deg 15' 37" N Longitude: 121 deg. 26' 29" E References: Northern most point, Yami Island: 21 deg. 6' 44" N Southern most point, Saluag Island: 4 deg. 35' 31" N Eastern most point, Languyan Point (Davao Oriental): 126 deg. 35' 44" E Western most point, Agutaya Point (Balabac Island): 116 deg. 56' 7" E Please note: This median reference point excludes the Kalayaan group 'Spratly Islands' and Benham Rise from Philippine Sea to the Pacific Ocean.
This article was last modified 7 years ago