“EVALUATION OF HANDHELD GPS AND DGPS ACCURACY FOR PLANIMETRIC MAPPING AT NACEST, MAKURDI, BENUE STATE”. BSP Journal of Multidisciplinary Research (BSPJMR), vol. 1, no. 1, Jan. 2025, https://iahiservices.com/journal/index.php/BSPJMR/article/view/20.