Ramadhan FD, Hariyanto Teguh, Handayani HH. Analysis of Urban Built-up Expansion Based on Combination of Spectral Indices in Surabaya City. geoid [nternet]. 2021Aug.1 [cited 2025Dec.13];17(1):21-37. vailable from: https://journal.its.ac.id/index.php/geoid/article/view/1702