Mapping Access to Water and Sanitation in Colombia using Publicly Accessible Satellite Imagery, Crowd-sourced Geospatial Information and RandomForests. - Niccolo Dejito; Ren Avell Flores; Rodolfo De Guzman; Isabelle Tingzon; Liliana Carvajal; Alberto Aroca; Carlos Delgado (CoRR, 2021)