In 1911, these different networks on different datums and with different origins were consolidated into one nationwide network and the Luzon Datum was established with triangulation station Balanacan as its datum origin. The Luzon Datum became the primary geodetic reference of all surveys in the Philippines.

It is the primary geodetic reference or origin of all geological surveys in the Philippines which means all maps and surveys made in the country use the Luzon Datum as reference point.

The Luzon Datum of 1911 is a geodetic datum that served as the base for the first modern survey of the Philippine Islands. It was defined by Station Balanacan as its origin point. The station’s geodetic latitude and longitude are N 13° 33′ 41.000″ and E 121° 52′ 03.000″ respectively.

The Luzon datum is defined in terms of the coordinates of Station Balanacan in Marinduque Province as computed on the Clarke Spheroid of 1866 as follows:Latitude: 13 degrees 33 minutes 41700 seconds NorthLongitude:  121 degrees 52 minutes 03700 seconds EastAzimuth to Baltazar: 9 degrees 12 minutes 37700 seconds