Enhancing the Land Cadastral Map of Indonesia through Parcel Boundary Alignment

The improvement of cadastral systems has become a major problem in Indonesia. Despite continuous efforts to digitize land cadastral maps, persistent difficulties such as gaps and overlaps remain in the cadastral data. This study utilizes the least squares adjustment method to improve the quality of land cadastral maps in Indonesia and address these difficulties. This method is preferred because of its ability to maintain the integrity of polygon forms and parcel areas, which are essential characteristics of cadastral mapping. In addition, the implementation seeks to provide visual indicators of the accuracy of adjustments, such as error ellipses and changes in parcel sizes. While errors in the vertex transformations within segments cause some gaps and overlaps to persist, these problems are addressed by post-processing approaches. The results indicate that this method can enhance the quality of land cadastral maps in Indonesia.