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Crop planting area is significant to agricultural structure adjustment and regional food balance policy. Based on field investigation and spectral property analysis of corn in HJ1-CCD images, different threshold configurations are set to build decision trees and corn planting area is precisely extracted utilizing multi-temporal HJ-1 CCD images in Zhecheng county, Henan Province of China. Both statistical...
Guam, USA has been facing drastic landscape change since World War II, especially when President John F. Kennedy lifted the Naval Clearing Act which opened Guam's ports to domestic and foreign visitors in 1962. Extensive construction activities in 1970s and 1980s changed the land cover in Guam, particularly the central and northern parts of Guam a lot. This research is focused on determination of...
Dense Dark Vegetation algorithm (DDV) is effectively used in retrieval of aerosol optical depth (AOD) from satellite images over land. However, the algorithm is only suitable for low albedo areas such as water and dense vegetation areas. The purpose of this paper is mainly to retrieve aerosol optical depth over none DDV pixels by using the kriging interpolation method, we first retrieve the aerosol...
With China's continuous economic development, the requirement of transportation capacity is increasing, and a corresponding increase in highway construction is raised to an important position. As regions, which highway route straddled, often have volatile features and complex geological environment. When facing the complicated geological environment, the traditional exploration methods in the field...
In recent years, as expansion of city size and urban population, waterlogging has become more frequently in Guangzhou. It has seriously affected people's routine life. In this study, an urban waterlogging model based on SCS (Soil Conservation Service) model and the GIS was built and was applied to assess hazard risk of waterlogging in Tianhe District of Guangzhou, China. It consists of three parts:...
Taking IGBP/GCTE terrestrial transects (NETC and CST) as study areas, the present work extracted NDVI of terrestrial eco-regions in the transects using the MODIS/16-day NDVI from 2004.04 to 2010.08, to investigate the phonological responding of different ecosystems to global changing in Northeast Asia through monitoring the pheological trends such as Onp, EndP, DurP, MaxP, MaxV and RanV from actual...
This paper took Yancheng region as the study area to explore the relationship between landscape pattern and water quality. Land use types were obtained from the classification of the TM images, 2006. Landscape patterns characterized by land use pattern and five selected landscape metrics were extracted from buffer zones, ranging from 200 to 1500m, and used in correlation analysis against various water...
This paper focuses on the detection of land cover change in Beijing using TM data collected on 22 May, 2002 and 20 May, 2010 respectively. For detailed analyzing the land cover change in different parts of Beijing, the central Beijing enclosed by fifth ring road was divided into 4 areas based on the ring roads. After image registration, mask and image clip, sample data of land cover types as water...
The objective of this research is to explore the spatial correlation between impervious surface, green space and urban heat island based on a case study of Nanjing, China. The Landsat TM image was used to retrieve land surface temperature. According to the impervious surface area (ISA) and the fractional vegetation cover (Fr) having an inversely relation in urban built-up areas, the spatial pattern...
In order to Investigation some changes which are created above time in poplar cultivated surface preparing updated map of poplar is one of the most important requirements in the management and region agricultural planning. In this research, surveying of poplar plantation investigated using IRS Satellite images in the region including province of Guilan, Iran. The method evaluated to images controlled...
Statistical Pattern Recognition is one of the basic techniques for land use/land cover classification of remote sensing image. Focusing on establishing a method to integrate statistical pattern recognition with geosciences' analysis, this paper proposed a segmentation-based remotely sensed imagery classification method, called ISODATA-Geosciences Imagery Classification (ISOGIC). The result from case...
Cyanobacteria bloom occurs constantly in recent years and seriously harms the environment of people's life. Lake Dianchi is a typical lake that has been subjected to severe eutrophication in recent years, especially in 2010. This article describes new-type, dynamic, high-quality images of Environment Satellite HJ-1 CCD applied to view cyanobacteria bloom of Lake Dianchi, ranging from November to December...
Present study focuses on identification and mapping of olive in the part of Roodbar region, Guilan, Iran, based on IRS images using spectral reflectance's stochastic and supervised classification techniques. Two methods evaluated to images controlled classification in order to separate olive orchards spectrum reflex from the other surface covers. At the first method, upper and lower limit of digital...
By allowing the estimation of forest structural and biophysical characteristics at different temporal and spatial scales, remote sensing may contribute to our understanding and monitoring of planted forests. In this paper, we used multi-temporal data from Landsat TM to investigate 9-year time-series of the Normalized Difference Vegetation Index (NDVI) in Dongying city, Shandong province, China. According...
Precipitation is a major source of freshwater in water cycle. Accurate information and spatial details of water availability are important to arid and semi-arid areas. This study examined the relationships between vegetation cover and rainfall variability in Australia from 2000 to 2008. Vegetation index can be treating as a proxy of precipitation. By linear regression of the EVI values to the rainfall...
Green coverage is an important indicator of health status of rangeland, and it's meaningful to improve the efficiency, accuracy and objectivity of green coverage measurement. Digital image analysis (DIA) technique becomes more attractive; however, there have been few advances in automatic measurement methods. In this paper, we automate rangeland green coverage measure by DIA, which is a novel threshold...
The change of ecological environment resulted from urbanization is being paid more and more attentions. In this paper, Landsat TM/ETM+ remote sensing images captured on 1992, 2001 and 2006 were selected to investigate the urban growth and the corresponding ecological responses. Index-based Built-up Index (IBI) was used to extract urban built-up area and derive built-up area density. The quantitative...
The spatial and temporal dynamics of the carbon storage of the paleobiomes in eight geological periods (early Carboniferous, late Carboniferous, middle Permian, early Jurassic, late Cretaceous, Eocene, Oligocene and Miocene) were analyzed in this study, based on the area and the estimated unit carbon density of the paleobiomes. The results showed that the change rates of the carbon densities of vegetation...
Based on an analysis of three phases of remote sensing images (1996, 2000 and 2005), we found the eco-environment changes of the northern wetland reserve area of Yellow River Delta during the three years. The distance from the Yellow River and soil salinity are important factors to control the macro-distribution of wetland types in the estuary wetland reserve area. Both of the natural factors (such...
Vegetation plays an important part in the carbon, water, and energy exchange at the land surface. Vegetation cover fraction is one of the most important variables in land surface modeling. HJ-1 satellites (Environment and Disaster monitoring and forecasting Satellite constellation) are advanced in revisit frequency and image coverage. It improves the abilities in monitoring vegetation dynamics from...
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