The Suitability Evaluation Based On GIS/RS For Farming Land In North Hebei Province Areas

The suitability evaluation for farming land is one of the most major contents ofland resource research in last decades, which divides suitable graduation of farming land, and then, according to the type and intensity of the restricted factor of each land unit, makes rebuild measures in line with the local conditions, and offer service for scientific management , rational utilization and planning land .Concepts and principles of land suitability evaluation are detailed introductive in this article which makes simple introduction on content system and method of 《A framework for land evaluation》 (FAO).Having made farming land as the object according to 《A framework for land evaluation》 ,this research confirmed "class" as the level of land suitability evaluation. According to actual conditions of the studying area and basic conditions of factors, this article confirmed 7 evaluating factors and 3 restricted factors, confirmed each factor's special weight with Delphi method. At last got the result of the suitability evaluation for farming land and analyzed the quantity and space distribution of the farming land in each suitable grade.The result shows: the highly suitable, the medium suitable, the margin suitable and unsuitable farming land's area including: 356180 hectares, 1485148 hectares, 808929 hectares, 29568 hectares, the proportion they take is: 13. 29%, 55. 42%, 30. 19%, 1. 1%. Through analyzing the quantity and space distribution of farming land of north hebei province areas, direct against the main restricted factor of each sub district, referred the actual conditions of the studying area, offered conductive suggestion to the adjustment of the farming land of north hebei province. The result offered the basis for the agricultural structural adjustment of the studying area.The whole evaluation course regards GIS and RS as the technological platform of the work, has realized greatly, formed a set of intact technological routes of evaluation, at the same time automation basically from beginning to the output of the...