<![CDATA[After the implementation of Complete Systematic Land Registration, more than 80% of land parcels in Kudus Regency had been certified. This achievement became one of the bases for the Ministry of Agrarian Affairs and Spatial Planning/National Land Agency to designate Kudus Regency as a target for complete district declaration in 2024. From a geospatial perspective, a complete district requires all registered parcels to be accurately mapped. However, several certified parcels remain unmapped or inaccurately mapped. This study aims to describe the efforts of the Kudus Regency Land Office to improve the spatial data quality of K4 parcels in Undaan District and to analyze the constraints and solutions encountered during implementation. This study used a qualitative descriptive method based on interviews, observation, and document review. The results show that the improvement of K4 spatial data quality after PTSL was carried out through three stages: inventory of PTSL data and spatial document archives, studio-based data improvement at the Land Office and village offices when valid documents were available, and field surveys when parcel verification, identification, or measurement was required. The main constraints included incomplete and inaccurate old spatial documents, K4 parcels overlapping with K3 parcels in the KKP system, and unresolved cases where old documents did not provide sufficient location information. These findings indicate that spatial data quality improvement after PTSL depends not only on digital mapping but also on archive availability, field verification, community knowledge, and institutional coordination. Keywords: spatial data quality improvement; land registration spatial documents; post-PTSL; K4 parcels; complete district land registration INTISARI Pasca pelaksanaan Pendaftaran Tanah Sistematis Lengkap di Kabupaten Kudus, capaian bidang tanah bersertipikat telah melampaui 80%. Capaian tersebut menjadi salah satu dasar bagi Kementerian Agraria dan Tata Ruang/Badan Pertanahan Nasional untuk menetapkan Kabupaten Kudus sebagai target deklarasi kabupaten lengkap tahun 2024. Secara geospasial, status kabupaten lengkap menuntut seluruh bidang tanah terdaftar telah terpetakan secara benar. Namun, sebagian bidang tanah bersertipikat masih belum terpetakan atau belum tepat posisinya. Penelitian ini bertujuan mendeskripsikan upaya Kantor Pertanahan Kabupaten Kudus dalam meningkatkan kualitas data spasial bidang K4 di Kecamatan Undaan serta menganalisis kendala dan solusi yang ditempuh. Penelitian menggunakan metode kualitatif deskriptif melalui wawancara, observasi, dan studi dokumen. Hasil penelitian menunjukkan bahwa peningkatan kualitas data spasial K4 pasca PTSL dilakukan melalui tiga tahapan, yaitu inventarisasi data PTSL dan arsip dokumen spasial, pekerjaan studio di Kantor Pertanahan dan kantor desa ketika dokumen yang tersedia valid, serta survei lapangan ketika diperlukan verifikasi, identifikasi, atau pengukuran bidang tanah. Kendala utama meliputi ketidaklengkapan dan ketidakakuratan dokumen spasial lama, tumpang tindih bidang K4 dengan bidang K3 dalam sistem KKP, serta bidang lama yang tidak diketahui letaknya oleh masyarakat. Temuan ini menunjukkan bahwa peningkatan kualitas data spasial pasca PTSL tidak hanya bergantung pada pemetaan digital, tetapi juga pada ketersediaan arsip, verifikasi lapangan, pengetahuan masyarakat, dan koordinasi kelembagaan. Kata Kunci: Peningkatan Kualitas Data Spasial, Dokumen Spasial Pendaftaran Tanah, Pasca PTSL, Pendaftaran Tanah Kabupaten Lengkap]]>
