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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...
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...
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...
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...
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...
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...
Soil erosion has been one of the worldwide environmental disasters which severely threaten the sustainable development of socio-economic, natural resources, and the environment. The Universal Soil Loss Equation (USLE) is the most widely used model to quantify soil erosion. The cover and management factor C is perhaps the most important USLE factor because it represents conditions that can most easily...
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