TY - RPRT TI - Mapping irrigated cropland extent across the conterminous United States at 30 m resolution using a semi-automatic training approach on Google Earth Engine AU - Yanhua Xie AU - Tyler J. Lark AU - Jesslyn F. Brown AU - Holly Gibbs PY - 2019 DO - 10.1016/j.isprsjprs.2019.07.005 UR - https://pubs.usgs.gov/publication/70215389 ID - 70215389 ER -