Land cover classification using Landsat Enhanced Thematic Mapper (ETM) data - year 2005

A fundamental dataset required for ecosystem analysis consists of the major types of land cover present in the study area and their areal percentages. Land cover refers to the physical nature of the surficial materials present in a given area such as water, grass, clay-rich soil, asphalt, or concrete. Land cover classification can be used as input into a variety of ecological models, and land cover maps can be constructed to aid in planning field sampling strategy. The land cover types can also be linked to different land use categories to investigate temporal and spatial changes in the urban ecosystem.

用于生态系统分析的基础数据集，通常包含研究区域内存在的主要土地覆被（Land Cover）类型及其面积占比。土地覆被指特定区域内地表物质的物理属性，例如水体、草地、富黏土壤、沥青或混凝土等。土地覆被分类可作为多种生态模型的输入数据，且可通过构建土地覆被地图辅助制定野外采样策略。土地覆被类型还可与不同土地利用类别相关联，以探究城市生态系统的时空变化规律。