Evaluating and planning of high quality basic farmland construction based on raster data: a case study of Lulong County, Hebei Province

High quality basic farmland construction is inherent components of the development of urban-rural integration, the construction of a new socialist countryside and national food security. This paper constructed an evaluation system of the suitability (low suitability (S1), medium suitability (S2), high suitability (S3)) and the spatial distribution coordination (low coordination(C1), medium coordination(C2), high coordination(C3)) of high quality basic farmland in Lulong County, Heibei Province by combining the grey relational evaluation method and the mutual exclusive matrix classification. Data layers were transformed to raster data of 30 m by 30 m pixel size. Basic farmland of S3C3, S2C3 and S3C2 are identified as the high priority construction area. S2C2, S1C3 and S3C1 are classified as the normal construction area. The coverage area of S1C2, S2C1 and S1C1 are identified as low priority construction area. Their acreage are 12 372.33 hm2, 13 978.95 hm2 and14 357.65 hm2 respectively. The area of non-construction (the planned area subtracts the allowed and potential construction area) is 3 200.64 hm2. This study might be a scientific reference for the evaluation of high quality basic farmland construction at regional level.