An Approach of Affine Projective Transformation for Cadastre Data Migration

Abstract

Digital Cadastral Database (DCDB) is emerging as a modern and comprehensive system that offers enhanced accuracy, compatibility and functionality for registration and management in land surveying practices. Modernising 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 aims to investigate the cadastre data migration process in Peninsular Malaysia. A case study focused on the state of Johor, and a few cadastre parcels were analysed during the study period. The study’s methodology consisted of data collection, which involved gathering Pangkalan Data Ukur Kadaster (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, identifying the inconsistencies, errors, and gaps, and then analysing the existing migration process to the DCDB. Afterwards, an Affine transformation was implemented, and the migration of PDUK data to DCDB needed to be conducted by considering the geometric properties of the parcels, such as points, straight lines, and/or planes. This established the relationship between the old and new datums. Subsequently, the pre-migration and post-migration datasets were compared in terms of accuracy and consistency. The area different from pre-migration and post-migration obtained is below 50 cm². From the comparison result, recommendations for improving the migration process, including adjustments to the fitting method, were obtained. The findings offer valuable insights into migrating PDUK data to DCDB for land surveying practices in the Malaysian Peninsular.