EVALUATION OF HANDHELD GPS AND DGPS ACCURACY FOR PLANIMETRIC MAPPING AT NACEST, MAKURDI, BENUE STATE. BSPJMR [Internet]. 2025 Jan. 8 [cited 2025 Jan. 23];1(1). Available from: https://iahiservices.com/journal/index.php/BSPJMR/article/view/20