Harmonisation of Geospatial Data in the Process Evaluation of Land Utilisation Suitability Based on Cadastral Land Parcel

Abstract

One of the fundamental components of Indonesia's Land Administration System (LAS) that still needs to be harmonised is the problem of ideal map geometry, namely spatial units of cadastral land parcels. The LAS has four key functions: land tenure, land value, land use, and land development. This study addresses the harmonisation of Geospatial Data (GD) for land development administration involving spatial planning. This spatial element is crucial in sustainable spatial planning for dynamic regional development. This study harmonises GD to synchronise the spatial planning map based on the cadastral map. We harmonises geometrical aspects of spatial planning maps and cadastral maps using Unmanned Aerial Vehicle (UAV) imagery and field survey as the base map. The analysis reveals that more than 25% of land parcels intersect with multiple spatial zoning maps. To address this, the study uses a hierarchical logic method to unify each cadastral land-parcel's spatial planning. Using cadastral land-parcel-based spatial zoning, the suitability of land utilisation in the study area is dominated by the limitedly and conditionally class, covering an area of 1,023,584 m²(40.72%). There is significant difference in area calculation of spatial utilisation suitability when using the original spatial map and cadastral land parcel, with a confidence level of 95%. This discrepancy arises from the different of map framework between zoning and cadastral maps. High-quality cadastral land parcel maps are essential to enhance the quality of spatial zoning maps and support sustainable LAS. The findings of this study underscore the importance of GD harmonization and quality improvement within the LAS framework, highlighting the impact of this harmonization on spatial zoning maps in Indonesia