Application of Affine Projective Transformation in Cadastre Data Migration in Peninsular Malaysia

Digital Cadastral Database (DCDB) is emerging as a comprehensive system that offers enhanced accuracy, compatibility and functionality in land surveying practices. The modernisation of land surveying practices has brought about a crucial need to upgrade the existing spatial database to the DCDB in the Geodetic Datum of Malaysia 2000 (GDM2000). This study is aimed to investigate the cadastre data migration process in Peninsular Malaysia. A case study focused on the state of Johor with few cadastre parcels analysed during the study period. The methodology of the study consisted of gathering the PDUK data, including land surveys, property boundaries, and related records as well as acquiring DCDB data and transformation parameters. Next, the data was analysed by evaluating the quality of PDUK data and identifying the inconsistencies, errors and gaps, then analysing the existing migration process to the DCDB. Afterwards, Affine transformation was implemented where the migration of PDUK data to DCDB needs to be conducted by considering the geometric properties of the parcels. This established the relationship between the old and new datums. Subsequently, pre-migration and post-migration datasets were compared in terms of accuracy and consistency with the parcels area different obtained are below 50 cm2. From the comparison result, recommendations for the improvement of the migration process, including adjustments to the fitting method were obtained. The findings offer valuable insights into the migration of PDUK data to DCDB for land surveying practices in the Malaysian Peninsular.