Based on the five-phase Landsat TM/ETM remote sensing image data, images were processed and landscape pattern indices calculated with help of ENVI FRAGSTATS software, respectively. Jian’ou city, a large agricultural city in northern Fujian Province, was used as county-scale study case to explore its changes during 20-year period from 1995 2015. The results show that development intensity increa...

The water deficit index (WDI) derived from Landsat imagery was used to detect temporal and spatial changes in grassland transpiration. The WDI, which estimates relative evapotranspiration rates based on meteorological data and the relation between surface reflectance and temperature, has been successfully applied over heterogeneous terrain with little a priori information. In this study, WDI wa...

Secchi disk depth (ZSD) is used to quantify water clarity as an important water-quality parameter, and one of the most mechanistic models for ZSD quasi-analytical algorithm (QAA), which latest version QAA_v6. There are two in QAA clear turbid waters (referred QAA_clear QAA_turbid). QAA_v6 switches between by setting a threshold value remote sensing reflectance (Rrs, sr−1) at selected reference ...

Urban built-up area information is required by various applications. However, urban built-up area extraction using moderate resolution satellite data, such as Landsat series data, is still a challenging task due to significant intra-urban heterogeneity and spectral confusion with other land cover types. In this paper, a new method that combines spectral information and multivariate texture is p...

Impervious surface area (ISA) is a key factor for monitoring urban environment and land development. Automatic mapping of impervious surfaces has attracted growing attention in recent years. Spectral built-up indices are considered promising to map ISA distributions due to their easy, parameter-free implementations. This study explores the potentials of impervious surface indices for ISA mappin...