The date of taking of the subject land for purposes of computing just compensation should be reckoned from the issuance dates of the emancipation patents. An emancipation patent constitutes the conclusive authority for the issuance of a Transfer Certificate of Title in the name of the grantee. It is from the issuance of an emancipation patent that the grantee can acquire the vested right of ownership in the landholding, subject to the payment of just compensation to the landowner.30G.R. No. 168533, February 4, 2008, 543 SCRA 627, 640.