Pixel Purity Index Algorithm and N-Dimensional Visualization For ETM+ Image Analysis: A Case of District Vehari. Global Journal of Human-Social Science, [S. l.], v. 12, n. A15, p. 23–32, 2012. Disponível em: https://socialscienceresearch.org/index.php/GJHSS/article/view/100323. Acesso em: 20 feb. 2026.