The study was conducted in 2014 - 2015 in Bao Lam District, Cao Bang Province to demonstrate the application of GIS in mapping land units and come up with options for different types of land use. Research has identified the decentralization indicators including soil type, slope, soil depth, mechanical composition and mode of irrigation, which uses the functionality of GIS spatial analysis to construct the map unisexual and overlay the map unisexual there to build maps of land units, including 99 units of land and 1 unit of NCR (rock with trees). Each LMU usually consists of 1-3 type of land use. The land use system of crop diversity, combining specialized rice, colored rice and short-term industrial plants; Between annual crops on slopes, agroforestry, and afforestation. The assessment of the ability to use appropriate soil types for land units has also been conducted. Past research shows that GIS is a powerful tool for mapping and land units launched were selected for this kind of use of land for agriculture and forestry.
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