LBA-ECO ND-30 Fractional Cover of Mixed Land Use Ranches, Para and Rondonia, Brazil

This data set contains images of fractional cover estimates of photosynthetic vegetation (PV) canopy, nonphotosynthetic vegetation (NPV), and exposed soils (S) derived from Landsat images (30-m resolution) obtained for two ranches in the Brazilian Amazon from 1996 to 2002. The Fazenda Vitoria ranch is located in eastern Para near the city of Paragominas and is a mosaic of primary forest, logged forest, secondary forest, and pasture with moderately dissected topography. The Fazenda Nova Vida ranch is located in the state of Rondonia in western Amazonia and is a mosaic of primary forest, logged forest, and pastures.

For Fazenda Vitoria, two dry-season Landsat images were obtained, subset, and analyzed. For Nova Vida three dry-season images and one end-of-wet-season image were obtained, subset, and analyzed. Spectral mixture analysis, which decomposes individual satellite pixels into constituent cover fractions of surface materials, was used with a general probabilistic modeling approach to derive subpixel cover fractions of PV, NPV, and S.

There are six GeoTIFF (.tif) files with this data set.

本数据集包含基于1996至2002年间获取的巴西亚马逊地区两座牧场的Landsat影像（分辨率30米）反演得到的光合植被（Photosynthetic Vegetation, PV）冠层、非光合植被（Nonphotosynthetic Vegetation, NPV）以及裸露土壤（Soil, S）的盖度估算影像。
维多利亚牧场（Fazenda Vitoria）位于帕拉州东部帕拉戈米纳斯市附近，地貌为中度切割地形，土地覆盖为原始林、采伐林、次生林与牧场的镶嵌组合；新生命牧场（Fazenda Nova Vida）地处亚马逊西部的朗多尼亚州，土地覆盖为原始林、采伐林与牧场的镶嵌组合。
针对维多利亚牧场，研究团队获取、裁剪并分析了两景干季Landsat影像；针对新生命牧场，则获取、裁剪并分析了三景干季影像与一景湿季末期影像。
研究采用光谱混合分析（将单个卫星像素分解为地表覆盖组分的盖度占比）结合通用概率建模方法，反演得到光合植被、非光合植被与裸露土壤的亚像元盖度。
本数据集附带6个GeoTIFF（.tif）格式文件。