This report will present interpolation method to develop the spatial data that include temperature-related data, rainfall-related data and evapotranspiration (agroclimatic elements); with pH data, soil texture and some hydrological agricultural constants (soil-related). The agroclimatic elements were interpolated from observing data (from National Hydro- Meteorological Services – NHMS) and other factors such as longitude, latitude, altitude, coastal distance… The soil data was developed from the soil map of Tay Nguyen highland region of Vietnam (National Institute of Agricultural Project and Plan – NIAPP). The resulting layers were used to define the suitable lands for coffee, rubber and tea crops in this region with ecological characteristic of these crops and GIS techniques. The research contributes to help the land manager and agricultural planner to develop land use and agricultural plan in Tay Nguyen highland. The research was implemented in Centre for Agrometeorology (CAM) – National Institute of Meteorology, Hydrology and Environment (IMHEN).