Võ Văn Việt1
1Trường Đại học Nông lâm, TP Hồ Chí Minh
Từ khoá: ứng dụng, GIS, đánh giá, khả năng thích nghi, đất nông nghiệp, Đồng Tháp
Using GIS for agricultural land suitability evaluation for Dong Thap province
Selected theme layers for study include soil group, soil texture, depth of Jarosite or Pyrite layers, depth of flood, duration of flood and irrigated condition. Theme layers were collected from existing maps and information. Soil texture and soil group are based on the soil map. Special and attribute data of abovementioned layers were digitized and encoded in a GIS database to create thematic layers. By overlaying the layers, a resultant polygonal layer was produced, each is a land unit with characteristics of the and. Land suitability classes are identified by matching the requirements of the land. This is the fundamental principle of land evaluation, which assesses the suitability of the land for specified kinds of land use. Each land use or each crop has different requirements so different types of land are best suited to different uses.