Geoscience Australia Landsat Fractional Cover Percentiles Collection 3

The Fractional Cover (Landsat) product, developed by the Joint Remote Sensing Research Program, provides information about the the proportions of:green vegetationnon-green vegetation (including deciduous trees during autumn and dry grass)bare areas for every 30m x 30m ground footprintIt provides insight into how areas of dry vegetation and/or bare soil and green vegetation are changing over time.It is important to be able to analyse and interpret fractional cover. For example, the 90th percentile of bare soil for a particular year will identify areas that have experienced a high portion of bare soil during that year.This product is designed to make it easier to analyse and interpret fractional cover. It uses the Fractional Cover (Landsat) product and calculates the statistical summaries (10th, 50th and 90th percentile) of fractional cover per epoch (whole-of-archive-summary, annual, seasonal).This product is available in the following forms:FC-PERCENTILE-SUMMARYThis contains a (10th, 50th and 90th percentile) of bare, green and non-green vegetation of all observations contained within the Digital Earth Australia (DEA) Fractional Cover time series (from 1987 to the most up to date imagery available).FC-PERCENTILE-ANNUAL-SUMMARYThis contains a (10th, 50th and 90th percentile) of bare, green and non-green vegetation of observations acquired in each full calendar year (1st of January - 31st December) from 1987 to the most recent full calendar year.FC-PERCENTILE-SEASONAL-SUMMARYThis contains a (10th, 50th and 90th percentile) of bare, green and non-green vegetation of observations acquired within each calendar season (DJF, MAM, JJA, SON). This product is available for the most recent 8 seasons.

由联合遥感研究计划（Joint Remote Sensing Research Program）开发的分数覆盖（Fractional Cover，Landsat）产品，可为每个30米×30米的地面像元提供三类地物的占比信息：绿色植被、非绿色植被（包括秋季落叶树木与干枯草本）以及裸地。该产品可用于解析干旱植被、裸土与绿色植被区域随时间的变化趋势。对分数覆盖数据进行分析与解读具有重要价值。例如，某一年份裸土占比的90分位数，可识别出该年内裸土占比偏高的区域。本产品旨在简化分数覆盖数据的分析与解读流程，它基于分数覆盖（Landsat）产品，针对不同统计周期（全存档汇总、年度、季节）计算分数覆盖的统计汇总值（10分位、50分位与90分位百分位数）。本产品包含以下三种形态：1. FC-PERCENTILE-SUMMARY：涵盖澳大利亚数字地球（Digital Earth Australia, DEA）分数覆盖时间序列（1987年至今的最新可用影像）中所有观测数据的裸地、绿色植被与非绿色植被占比的10分位、50分位与90分位百分位数。2. FC-PERCENTILE-ANNUAL-SUMMARY：涵盖1987年至最近一个完整自然年中，每个完整日历年度（1月1日至12月31日）内获取的观测数据的裸地、绿色植被与非绿色植被占比的10分位、50分位与90分位百分位数。3. FC-PERCENTILE-SEASONAL-SUMMARY：涵盖每个日历季节（DJF、MAM、JJA、SON）内获取的观测数据的裸地、绿色植被与非绿色植被占比的10分位、50分位与90分位百分位数。本产品仅提供最近8个季节的数据集。