MODIS Land Cover Date数据说明.docx

MODIS Land Cover Date数据说明 MOD12Q1三级数据土地覆盖类型产品（Land Cover data）是根据一年的Terra和Aqua 观测所得的数据经过处理，描述土地覆盖的类型该土地覆盖数据集中包含了17个主要土 地覆盖类型，根据国际地圈生物圈计划（IGBP），其中包括11个自然植被类型，3个土地 开发和镶嵌的地类和3个非草木土地类型定义类 MODIS Terra + Aqua三级土地覆盖类型年度全球500米产品MCD12Q1采用五种不同 的土地覆盖分类方案，信息提取主要技术是监督决策树分类下面是该数据中包含的五个 数据集，五个分类方案如下： 土地覆盖分类1：IGBP的全球植被分类方案 土地覆盖分类2：美国马里兰大学（UMD格式）方案 土地覆盖分类3：基于MODIS叶面积指数/光合有效辐射方案 土地覆盖分类4：基于MODIS衍生净初级生产力（NPP）方案 土地覆盖分类5：植物功能型（肺功能）方案 MCD12Q1是HDF格式的，包含16个数据集 Science Data Set Units Data-Type Fill Value Valid Range Land Cover Type 1 (IGBP)* Class # 8-bit unsigned 255 0–254 Land Cover Type 2 (UMD)* Class # 8-bit unsigned 255 0–254 Land Cover Type 3 (LAI/fPAR)* Class # 8-bit unsigned 255 0–254 Land Cover Type 4 (NPP/BGC)* Class # 8-bit unsigned 255 0–254 Land Cover Type 5 (PFT)** Class # 8-bit unsigned 255 0–254 Land Cover Type 1 Assessment % Integer 8-bit unsigned 255 0–254 Land Cover Type 2 Assessment Not populated 8-bit unsigned 255 0–254 Land Cover Type 3 Assessment Not populated 8-bit unsigned 255 0–254 Land Cover Type 4 Assessment Not populated 8-bit unsigned 255 0–254 Land Cover Type 5 Assessment Not populated 8-bit unsigned 255 0–254 Land Cover QC Concatenated Flags 8-bit unsigned 255 0–254 Land Cover Type 1 Secondary Class # 8-bit unsigned 255 0–254 Land Cover Type 1 Secondary % Not populated 8-bit unsigned 255 0–254 Land Cover Property 1 Not populated 8-bit unsigned 255 0–254 Land Cover Property 2 Not populated 8-bit unsigned 255 0–254 Land Cover Property 3 Not populated 8-bit unsigned 255 0–254 前五个就是五个分类方案的分类图，接下来是分类评估图、其中只有type1有产品， 还有质量控制数据集 各种分类数据中，数值代表类别如下表： （以上数据均出自https:// /products/modis_products_table ） Class IGBP (Type 1) UMD (Type 2) LAI/fPAR (Type 3) NPP (Type 4) PFT (Type 5) 0 Water Water Water Water Water 1 Evergreen Needleleaf forest Evergreen Needleleaf forest Grasses/Cereal crops Evergreen Needleleaf vegetation Evergreen Needleleaf trees 2 Evergreen Broadleaf forest Evergreen Broadleaf forest Shrubs Evergreen Broadleaf vegetation Evergreen Broadleaf trees 3 Deciduous Needleleaf forest Deciduous Needleleaf forest Broadleaf crops Deciduous Needleleaf vegetation Deciduous Needleleaf trees 4 Deciduous Broadleaf forest Deciduous Broadleaf forest Savanna Deciduous Broadleaf vegetation Deciduous Broadleaf trees 5 Mixed forest Mixed forest Evergreen Broadleaf forest Annual Broadleaf vegetation Shrub 6 Closed shrublands Closed shrublands Deciduous Broadleaf forest Annual grass vegetation Grass 7 Open shrublands Open shrublands Evergreen Needleleaf forest Non-vegetated land Cereal crops 8 Woody savannas Woody savannas Deciduous Needleleaf forest Urban Broad-leaf crops 9 Savannas Savannas Non-vegetated Urban and built-up 10 Grasslands Grasslands Urban Snow and ice 11 Permanent wetlands Barren or sparse vegetation 12 Croplands Croplands 13 Urban and built-up Urban and built-up 14 Cropland/Natural vegetation mosaic 15 Snow and ice 16 Barren or sparsely vegetated Barren or sparsely vegetated 254 Unclassified Unclassified Unclassified Unclassified Unclassified 255 Fill Value Fill Value Fill Value Fill Value Fill Value 。