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Article | Green Intelligent Systems and Applications | Volume 6 - Issue 2 - 2026 | 195–206 | https://doi.org/10.53623/gisa.v6i2.1282
© 2026 by the author(s), and is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License Creative Commons Attribution 4.0 International (CC BY 4.0) License

Preprocessing and Adaptive Parsing of Unstructured Voter Turnout Data with Spatial Feature Enrichment

Author(s): Arya Pratama Tarigan , Mohammad Andri Budiman ORCID https://orcid.org/0000-0002-7716-2206 , Ade Candra
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Faculty of Computer Science and Information Technology, Master’s Program in Data Science and Artificial Intelligence, Universitas Sumatera Utara, Medan, Indonesia

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Green Intelligent Systems and Applications

Volume 6 - Issue 2 - 2026

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The raw input data exhibited severe structural heterogeneity, manifesting as seven distinct structural formats (Formats A–G) characterized by inconsistent header placement, nested merged cells, variable string representations, and missing values. To address these challenges without relying on static rule-based scripts, an intelligent adaptive parser was developed using dynamic regular expressions (regex) and token-density schema mapping based on normalized Levenshtein distance. The adaptive pipeline automatically identified table structures and standardized heterogeneous column definitions into a unified relational database, achieving a data-cleaning accuracy of 99.4%. To enhance the analytical value of conventional demographic data, a spatial feature enrichment pipeline was implemented by integrating three external Application Programming Interfaces (APIs): OpenStreetMap Nominatim for high-precision geocoding, the Google Maps Distance Matrix API for calculating actual road-network distances and travel times, and the Open-Meteo Elevation API for extracting elevation data. This study contributed to public sector data engineering by demonstrating that the integration of automated adaptive parsing with geospatial multi-API enrichment successfully transformed fragmented public documents into a high-fidelity, multidimensional data repository suitable for robust spatial–demographic policy analysis.

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SUBMITTED: 01 July 2026
ACCEPTED: 24 July 2026
PUBLISHED: 31 July 2026
SUBMITTED to ACCEPTED: 23 days
DOI: https://doi.org/10.53623/gisa.v6i2.1282

Cite this article
Tarigan, A. P., Budiman, M. A. ., & Candra, A. . (2026). Preprocessing and Adaptive Parsing of Unstructured Voter Turnout Data with Spatial Feature Enrichment. Green Intelligent Systems and Applications, 6(2), 195–206. https://doi.org/10.53623/gisa.v6i2.1282
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