1975
Philippine Coast and Geodetic Survey
1:250k
1912
1:60k
1:411k
1930
C&GS
1:35k
1899
U.S. Coast and Geodetic Survey
1:1m
1900
Algué, P. José
1897
1:759k
1915
Bureau of Science . Division of Mines
1749
Aubert, J.M.