In the heart of landlocked Mali, between the Atlantic Ocean 800 miles to the south and the Sahara desert to the north, lays the extraordinary Inner Niger River Delta, also known as the Macina, a 1.8 million hectare oasis of lakes and floodplains with a vast potential for hydro agriculture. In the course of two months during the dry season, two CIRA survey teams, each equipped with three Spectra Precision ProMark 500s, a base station, and two rovers connected via UHF, completed an entire 25,000 hectare survey.