AKURASI HASIL PENINGKATAN KUALITAS BIDANG TANAH DENGAN METODE BLOCK ADJUSTMENT MENGGUNAKAN TITIK KONTROL DARI PETA FOTO (STUDI KASUS PETA FOTO KANTOR PERTANAHAN KABUPATEN SLEMAN)

DESGA PERKASA, 21303826 (2025) AKURASI HASIL PENINGKATAN KUALITAS BIDANG TANAH DENGAN METODE BLOCK ADJUSTMENT MENGGUNAKAN TITIK KONTROL DARI PETA FOTO (STUDI KASUS PETA FOTO KANTOR PERTANAHAN KABUPATEN SLEMAN). Diploma thesis, Sekolah Tinggi Pertanahan Nasional.

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Abstract

This study aims to analyze the accuracy and effectiveness of the block adjustment method for improving cadastral data quality by comparing two types of control points: field measurements obtained using GNSS Real Time Kinematic (RTK) and manually interpreted points from high-resolution aerial photomaps. The research was conducted in Banyuraden Village, Sleman Regency, involving 72 land parcels distributed across three blocks. A quantitative comparative approach was employed, with data processed using the PEREKAT plugin in QGIS software. Photomap control points had spatial resolution of GSD ≤ 0.12 meters and horizontal accuracy of CE90 ≤ 0.4 meters. Accuracy testing was based on PMNA/KBPN Regulation No. 3 of 1997 and ATR/BPN Regulation No. 21 of 2019, while effectiveness was validated against a 5% maximum area difference tolerance as per 2021 PTSL guidelines. Results showed that block adjustment using photomap control points achieved high accuracy and over 80% validation effectiveness, qualifying as very effective. This research demonstrates that photomap-derived control points offer a practical and efficient alternative for land boundary alignment, especially in hard-to-access areas. The study contributes data-driven recommendations for cadastral data improvement and supports the digital transformation of land registration services. Keywords: Block Adjustment, Photomap, Cadastral Accuracy

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